With Tae-ju in an unconscious state, Jung-in turns to the Wonderland service to help cope with his absence. Park Bo-gum plays Tae-ju and Bae Suzy plays Jung-in.
Tae-ju and Jung-in are deeply in love, but their love story takes a tragic turn when Tae-ju falls into a coma with no hope of waking up.
To fill the void left by his absence, Jung-in uses Wonderland to maintain the illusion that Tae-ju is alive and well and that they are in a long-distance relationship.
Navigating between reality and illusion
In the AI-stimulated world of Wonderland, Jung-in chooses to make Tae-ju an astronaut because the real Tae-ju feels far away from her.
The Wonderland version of Tae-ju acts as both Jung-in’s AI assistant and boyfriend, knowing every detail about her life and taking care of her.
Jung-in talks to him frequently, and they go on virtual dates, which allows Jung-in to replace the real Tae-ju with the Wonderland Tae-ju.
When the real-life Tae-ju miraculously wakes up, Jung-in is relieved, but the doctor warns her that Tae-ju will have problems adjusting.
Jung-in decides to discontinue Wonderland now that she has the real Tae-ju. Initially, she is happy to have Tae-ju back, but her happiness is short-lived.
As warned by the doctor, Tae-ju suffers from cognitive dissonance. He struggles to return to his old self and adapt to daily life.
Similarly, Jung-in has difficulty accepting the fact that Tae-ju has changed. She feels disconnected from him, as she no longer understands him.
She misses the Wonderland Tae-ju, who was more like the person she fell in love with. Tae-ju tries to make Jung-in happy, but all his efforts fail, resulting in Jung-in reactivating Wonderland.
Coming to terms with reality
When a fire breaks out in Tae-ju’s building, the police suspect Tae-ju. Even Jung-in does not believe him when he tells her that he is not responsible for the fire.
To prove that he is better now and mend their relationship, Tae-ju plans to go on a trip with Jung-in, but she is hesitant. Tae-ju then questions her about the calls she keeps getting.
Jung-in decides to reveal the truth, and Tae-ju finds out that Jung-in has been talking to his virtual counterpart. He realizes that she expects him to be like the Wonderland Tae-ju.
Tae-ju is aware that he may never meet her expectations, so he decides to end their relationship. Jung-in then discontinues the Wonderland service for good, ending the astronaut Tae-ju’s story by returning him to Earth.
In their final meeting, Jung-in explains to Tae-ju why she initially used the service. Tae-ju then says goodbye to her, and they part ways.
However, Jung-in then recalls their time together and realizes that she cannot let him go. She decides to accept the real Tae-ju, and they give their relationship another chance.
Also Read: Wonderland summary and ending explained