The Trauma Code: Heroes on Call is a high-stakes South Korean medical drama that captivates with its intense exploration of the relentless world of trauma care.
Set within Hankuk National University Hospital, the series highlights the challenges faced by medical professionals as they navigate life-or-death situations, bureaucratic pressures, and personal conflicts.
One of the most compelling characters in this series is Dr. Yang Jae-won, played by Choo Young-woo.
Introduced as a bright yet timid colorectal surgeon, Jae-won’s journey is one of immense growth, both professionally and personally.
Initially hesitant and uncertain, he evolves into a confident and capable trauma specialist under the mentorship of the fearless protagonist, Dr. Baek Kang-hyuk, the lead trauma surgeon at the hospital.
His character arc is pivotal to the series, as it encapsulates the essence of overcoming self-doubt and embracing the challenges of trauma care.
Overview
Introduction
Dr. Yang Jae-won enters the story as a promising yet understated figure at Hankuk National University Hospital.
Specializing in colorectal surgery, he is known for his sharp intellect and academic excellence, having earned scholarships throughout medical school.
His dedication to his craft and keen understanding of his field set him apart as a bright young talent.
However, despite his achievements, Jae-won is far from the stereotypical confident overachiever.
Instead, he is depicted as reserved and modest, often overshadowed by his own self-doubt.
What makes Jae-won immediately endearing is his honesty and genuine compassion for his patients.
These qualities, combined with his youthful charm, earn him a reputation among the nurses as the “cute” doctor in the hospital.
His approachable demeanor and innocence make him well-liked, but they also highlight his struggle to project authority or confidence in high-pressure situations.
Jae-won’s tendency to overthink and second-guess himself often leaves him hesitant, especially when faced with challenges outside his comfort zone.
Beneath his timid exterior, however, lies a strong desire to prove himself and make a meaningful impact.
His character is introduced at a crossroads in his career, showcasing the early seeds of his internal conflict.
Protégé no. 1
Dr. Yang Jae-won’s life takes a pivotal turn when he catches the attention of the protagonist, Dr. Baek Kang-hyuk, the hospital’s daring and unconventional trauma surgeon.
Known for his brilliance and fearless approach to saving lives, Baek sees potential in Jae-won that even the young doctor doesn’t recognize in himself.
This moment sparks a dramatic shift in Jae-won’s career trajectory, forcing him to choose between staying in the comfort zone of colorectal surgery under his original mentor, Dr. Han Yoo-rim, or stepping into the unpredictable and high-stakes world of trauma care with Baek.
Initially hesitant, Jae-won struggles to reconcile the stability of his initial specialty with the chaotic demands of trauma surgery.
Dr. Baek’s methods, often bordering on reckless, leave him flustered and unsure if he can keep up.
To break the ice—and perhaps as a playful nudge—Baek nicknames Jae-won “Anus,” a cheeky reference to his background in colorectal surgery.
While the nickname initially embarrasses Jae-won, it soon becomes a marker of his journey.
As he gains experience and proves himself, Baek begins calling him “Number 1,” a title that signifies his role as Baek’s first protégé and growing trust between them.
The dynamic between the two is central to Jae-won’s development.
Baek’s unorthodox methods, which often push the limits of safety and protocol, shock Jae-won, who is used to the structured and controlled environment of his previous specialty.
Baek’s ability to prioritize the patient’s survival over everything else—hospital bureaucracy, personal safety, or even his reputation—both frustrates and fascinates the young doctor.
Over time, these methods challenge his timid nature, forcing him to step up and embrace the unpredictable realities of trauma surgery.
Jae-won’s respect for Baek grows as he begins to see the deeper motivations behind his mentor’s actions.
One of the turning points in their relationship comes when Jae-won learns about Baek’s personal tragedy—the loss of his father in an accident—which inspired him to dedicate his life to trauma surgery.
This revelation gives Jae-won a newfound understanding of Baek’s unwavering dedication and fuels his own determination to improve as a trauma surgeon.
Through their relationship, Baek becomes not only a teacher but a figure of inspiration, showing Jae-won what it truly means to commit to saving lives, no matter the cost.
Turning points in his journey
Dr. Yang Jae-won’s transformation from a hesitant, unsure doctor into a confident trauma surgeon is marked by several defining moments that test his skills, resilience, and moral convictions.
Each turning point shapes not only his career but also his identity as a medical professional.
First major test: Saving Ji-yeong
One of Jae-won’s earliest and most emotionally taxing challenges comes when his friend Ji-yeong—who also happens to be the daughter of his original mentor, Dr. Han Yoo-rim—is brought into the trauma center after a severe accident.
For Jae-won, the stakes are deeply personal.
His hands tremble, and his mind races with doubt, knowing that any mistake could cost her life.
Under Dr. Baek guidance, Jae-won manages to focus and assist in stabilizing her condition.
This experience marks a critical turning point, forcing him to confront his fears and focus on the task at hand, even when the patient’s life holds personal significance.
Successfully aiding in her recovery cements his decision to stay in trauma care and reinforces his trust in Baek’s mentorship.
Proving himself: Solo surgery during a Code Black
Jae-won’s confidence begins to take root during a catastrophic Code Black scenario.
A dense fog leads to a massive vehicle pile-up on a bridge, resulting in multiple critical injuries and chaos at the trauma center.
With Baek caught up in another emergency, Jae-won is thrust into the lead role for the first time.
One particular case—a young man impaled by a pipe through his abdomen—becomes his defining moment.
Despite his fear and inexperience, Jae-won steps up, performing the surgery with precision and composure.
Successfully saving the patient earns him recognition from the team and reinforces his belief in his capabilities.
This moment proves he is no longer just a timid follower but a surgeon capable of leading under pressure.
Moral dilemma: Confronting Baek
Jae-won’s journey isn’t without conflict.
One of the most intense moments in his relationship with Baek occurs during an ambulance ride with a critically injured patient.
Despite the patient suffering from severe head trauma with slim chances of survival, Baek insists on performing a procedure inside the moving ambulance, defying conventional medical protocols.
Frustrated and overwhelmed, he snaps, questioning the point of risking so much when it feels futile—especially in a system that prioritizes cost-cutting over patient welfare.
However, Baek’s unwavering commitment to trying until the very end forces Jae-won to reflect on the core principles of trauma surgery.
Over time, he comes to understand that their duty as trauma surgeons is not to guarantee survival but to fight for every patient’s life, no matter the odds.
Understanding Baek’s past
A deeper layer of Jae-won’s growth emerges as he learns about Baek’s enigmatic past.
Discovering that Baek once worked as a medic for a private militia known as Black Wings, Jae-won is confronted with difficult questions about his mentor’s choices.
He learns that Baek’s ability to fly helicopters and his uncanny calmness in high-stakes situations stem from his time in combat zones, where he likely took lives to save others.
While initially shaken by this revelation, Jae-won refrains from judging Baek, recognizing the sacrifices his mentor made to gain the skills that now save countless lives.
This understanding deepens Jae-won’s respect for Baek and solidifies their bond.
Growth under pressure: Mission in South Sudan
Jae-won’s turning points are not limited to the hospital.
He joins Baek on a mission to South Sudan, where they are tasked with treating a critically injured Korean soldier from a UN peacekeeping force.
The experience exposes Jae-won to trauma care in one of the most challenging environments imaginable.
Limited resources, extreme conditions, and the pressure to save lives in a foreign, dangerous setting push Jae-won far beyond his comfort zone.
Here, he witnesses Baek’s brilliance in action, observing his mentor’s resourcefulness and resilience under intense pressure.
Jae-won grows significantly as a surgeon during this mission, learning to think on his feet and make critical decisions with limited support.
The final test: Saving Baek
The ultimate test of Jae-won’s growth comes when Baek himself is injured during an explosion at a burning building.
With his mentor’s life on the line, Jae-won must step into Baek’s shoes, performing a life-saving surgery on the very person who taught him everything he knows.
In this moment, Jae-won channels all the lessons Baek imparted, approaching the surgery with calmness, precision, and determination.
Saving Baek’s life is not only a testament to his skill but also a culmination of his transformation.
This act earns him the ultimate validation when Baek finally addresses him by his real name, signifying the respect and trust Jae-won has long sought.
Second-in-command
Dr. Yang Jae-won’s journey in The Trauma Code: Heroes on Call is a testament to the transformative power of perseverance, mentorship, and personal growth.
Starting as a hesitant colorectal surgeon riddled with self-doubt, his evolution into a vital member of the trauma team is marked by his resilience and willingness to embrace challenges head-on.
Overcoming his insecurities and fears, he grows into a calm, capable, and decisive surgeon, fully equipped to handle the relentless demands of trauma care.
By the end of season 1, Jae-won emerges as Dr. Baek Kang-hyuk’s trusted second-in-command.
His journey comes full circle as he takes on a new mission: recruiting and inspiring fresh talent to join the trauma center.
With the hospital expanding its trauma division, supported by the health ministry, Jae-won steps into a leadership role, becoming a beacon of hope and guidance for new applicants.
