Xiao Bai has suffered from an incurable disease since childhood. After being picked up from the hospital by a mysterious stranger and taken to a place that seemed vaguely familiar, the young man tries to piece together what connects them. In the distant past, young Xiao Bai, keen on investigating mysterious incidents and treating mysterious diseases, tries to help a good friend cope with trouble. His ears are constantly ringing, and the young master does not understand how to get rid of it, and after some time he begins to imagine that a giant insect is hiding in the house! The searches come up empty, and Xiao Bai assumes that a spirit is involved in this matter...