Irene Jiang, a strong business woman, is about to marry into a rich family and become the daughter-in-law of General Anu who has real power. Her three besties throw her a bachelorette party at a themed hotel. In the middle of the night, Irene was found dead in her bedroom bathtub with a dagger in her chest. Who killed Irene Jiang? General Anu sent the pair of psycho detectives to find the murderer. Three besties each had a bad idea, they claimed others as the murderer. The detectives, through personal memories of the bachelor party, gradually solved the mystery of Irene Jiang, but after the case is closed, they found that there is something else behind the case...