Ark: Year 47

In the 47th year after the nuclear winter, 3,000 people were imprisoned in the underground "Ark" waiting for the surface to be lifted. Lin Shen is a technician at the Memory Archives, responsible for repairing historical data that has been tampered with by others. He discovered two secrets: the radiation level on the surface has dropped to a tolerable range, but the official is still saying "cannot return"; and his wife suffers from a rare disease - each time she gets sick, she will randomly lose a memory, as if something is selectively erasing her past. As he traces the connection between the two secrets, he discovers a crueler truth: The Ark was not built to wait for the radiation to dissipate. It was a century-long social experiment. Everyone's memories have been manipulated. And his wife is not sick - she is the only one among the 48 "memory decline cases" who has begun to recover her original memories.