Jiachen and Zhiyu are a homosexual couple.
Jiachen has a group of friends called classmates who brought Zhiyu into their circle of friends a year ago.
The two moved in together eight months after they met.
Jiachen, who has a win-win career and relationship, originally thought that life would be dull, but he didn't know that a greater unknown was waiting for him.
Zhiyu disappeared, his friends behaved abnormally, and even his own memory went awry.
How should Jiachen face a world that he can't even believe in?
If you think of the faces of friends you once trusted, can you be sure that you really know what is behind those faces?