关潮为了能回到过去，寻找着能启动时间枪的能源“灼石”，却意外掉入了记忆管理局。为了能重新回到现实，关潮和方糖、百重等记忆管理员一起逐层回收记忆层中的BUG人。随着一场场战斗相继落幕，关潮要面对的是……

Unwilling to accept the death of his friend Shi Yan, the protagonist materializes him in his memory in the form of Bug Man, who he plays with to escape from the depressing reality. Bug Man in monitored by the Memory Management Bureau, and memory collectors Fang Tang and Bai Zhong are assigned to retrieve him.

A young man gets caught up in fantasies about a girl he used to know, speaking to a version of her that he has constructed in his mind. Then, one day, she meets the real her again.