Jae-pil, who runs a karaoke, has been receiving anonymous blackmails. One day, he gets into a fight with his friend Dae-hyun and ends up knocking him unconscious. Then he receives another text. It says the blackmailer will release the video of him killing Dae-hyun if he refuses to follow his orders. The order is to find one of his customers, Choi Sang- cheol, and kill him in time.