Season 1
Set in the 2040s in the large city area of South Korea. It depicts the story of a man who lives in agony, unable to forget his wife who died of cancer. Then one day, he receives an unknown email and chooses to abandon his body to go live with his wife. It will portray a world where one can live forever without death, and will question the meaning of eternal life, death, memory and oblivion, and happiness and misery.
The Remaining Person
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.
Wife's Contract
Jaehyun receives a call from Joeun, head of the organ donation unit, telling him that something strange has been discovered in Yihoo's body.
Rendezvous With a Memory
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.
Beyond the Memories
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.
Life After Death
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.
Everyone's Own Heaven
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.