Mouri, Ran, and Conan are invited by the hostess of a car accident charity named Shou Beniko. While driving, they find a message from the Phantom of the Cursed Masks who tells them they should not go. Once there, they find other famous celebrities; a baseball player, a prophet, a rockstar, and a man who lost his wife in a Hit and Run incident. The mansion they will be staying at is a huge mansion divided by the east and west side; and the only room connecting the two sides is the mask room, which is locked at midnight due to Shobel's mask. They were created by a famous man who lost everything and became engrossed in his masks; once he created 200 of them, he was found dead in his room surrounded with bloody masks. People who have owned his mask have suffered tragic fates. Shou who now owns all 200 masks has a priest place a seal on the curse, but the room will locked at midnight to prevent them from wandering. During their stay, Shou was murdered in a locked room with masks surrounding her and a dagger in her throat. Conan later figures out the trick and reveals the culprit. The culprit reveals that his mother was blamed for a hit and run incident and murdered by Shou, who then took fame and profit from her charity.