Jiang Ailin, a powerful businesswoman, is about to marry into a wealthy family and become the daughter-in-law of General Anu, a figure of great influence. Her three close friends throw her a bachelorette party at a themed hotel. In the middle of the night, Jiang Ailin is found dead in the bathtub of her bedroom, with a dagger plunged into her chest. Who killed Jiang Ailin? General Anu sends the duo of Nanke and Kindaichi, the "Neural Detectives," to investigate the murder. Each of the three friends harbors ulterior motives and points fingers at one another as the culprit. The detectives meticulously unravel the mystery by piecing together each person’s memories of the bachelorette party, gradually uncovering the truth behind Jiang Ailin’s death. However, after closing the case, they discover that there is more to the story than meets the eye…
