When Yihoo realizes that Jihyo isn't growing anymore, she goes to the protocol center with her baby. While searching for Yihoo, Jaehyun meets Doctor Jang Jinho and learns about the Yonder's vulnerability.

A new euthanasia law introduces a way forward for those that are terminal. Yihoo, in excruciating pain with stage IV heart cancer, chooses this new path.

Jaehyun receives a call from Joeun, head of the organ donation unit, telling him that something strange has been discovered in Yihoo's body.

As Choi Hanki leaves for Yonder, he leaves one final message: 'There is nothing here to hold me, so I have nothing to lose.' This convinces Jaehyun, and she decides to go to Yonder as well.

Peach receives a text from her dead father inviting her to live with him. Jaehyun tries to convince Peach that it's all in her imagination.

To find out where the connection between 'BY N BY' and 'VRophin' lies, Jaehyun, Hacker Park and Joeun go to Doctor K's announcement of the introduction of Brophin.