Zhang Jian-He, a reserved and rather introverted cartoonist, is dating a beautiful and conservative girlfriend, YaShi. One day, in an unfortunate dispute with his best buddy Chen-Jun, is accidentally killed by Zhang Jian-He. To cover up his dead, Jian-He cleaned the bloodstains and any entailing evidence of the crime scene, and found a unique and creative way to dispose of Chen-Jun's body. Soon Jian-He discovered a shocking truth: Chen-Jun was sleeping with YaShi all the time. Zhang Jian-He felt the utmost pain for being cheated by his best friend, and the girl he love is just a slut. The story soon brought out traces of a serial killer Jia-Ming, who murdered his own father when he was a minor. Disguished as a policeman, Jia-Ming return to his killing spree soon after his released from the prison, and through an online instant messenger, Jia-Ming get to know Zhang Jian-He...