Zhang Jian-He, a reserved and rather introverted cartoonist, is dating a beautiful and conservative girlfriend, YaShi. One day, in an unfortunate dispute, Jian-He accidentally kills his best buddy Chen-Jun. To cover up his deed, Jian-He clears away all the incriminating evidence from the crime scene and finds a unique and creative way to dispose of the body. Soon, however, Jian-He discovers a shocking truth: Chen-Jun was sleeping with YaShi all the time. Jian-He feels unimaginable pain at finding out that his girlfriend was cheating on him with his best friend. In a bizarre twist, serial killer Jia-Ming (who murdered his own father when he was a child) enters the scene and contacts Jian-He via instant messenger. Disguised as a policeman, Jia-Ming returns to his killing spree shortly after his release from prison. Even stranger, Jia-Ming pays a visit to Jian-He's home and discovers that YaShi is accusing Jian-He for the murder of Chen-Jun. Now the real fun begins in this darkly comic and blood-soaked story.