Shen Mian's fiancé Lu Ci miraculously survived three months after his death in a construction site accident, but she confirmed the third minute she saw him: This man was not Lu Ci.
He is the backup person - a copy with all Lu Ci's memories, activated by a secret system to inherit the life of the original. Everyone believed it except Shen Mian. She gave him a name that belonged only to him and told him in front of Lu Ci's grave: You are your own. But when the system manager pressed harder and the backup person could be formatted at any time, Shen Mian discovered that her memory from three years ago had also been erased - she was one of the designers of the backup plan, and she was also the backup person.
Can two people, neither of whom is an "original", become each other's new life?
Intent: The reason why a person is a "person" is not because of whose memory he has, but because he has made his own choices. Lu Chen used every choice that Lu Ci could not make to prove that he was not a copy; Shen Mian used every recognition to prove that love is not repairing and replacing, but rebuilding from the ruins. What the story ultimately says is that everyone is looking for themselves, and the true self is not in the data of the past, but in every choice of the present.