Mr. Chan (played by Dayo Wong) was originally a top agent, but was suspended due to a careless mistake by his partner. He also offended policewoman She Xiang (played by Charmaine Sheh) and owed her a love debt. Twenty years later, celebrities in the city have gone insane one after another. Mr. Chan was entrusted with an important task again, thinking that he could show his skills, but who knew that this case was related to drugs in the otaku circle. For the sake of social peace, Mr. Chan had to transform himself into an unkempt otaku to investigate the case, which caused various difficulties and laughter.