In an isolated island city "Asselburg" shrouded in eternal fog, a strange phenomenon called "amnesia" is the fate of the citizens. It will slowly strip away people's emotional memories, leaving only cold knowledge and facts. The duty of the memory master Ling Feng is to repair and reshape the disappearing past for people. When his beloved wife, painter Ila, also showed early symptoms of amnesia, Ling Feng's world began to collapse. He discovered that the "time compass" that maintains the city's memory was abnormal, and the city's rulers seemed to be covering up a cruel truth about "gradual forgetfulness" and "eternal life." In order to protect the memory of his lover, Ling Feng embarked on a dangerous journey against the fate of the entire world.