In Haunted Night, Mark and his friends, Misaki and Ango, embark on a Halloween night filled with trick-or-treating. They come across a mysterious house offering candy as a prize for surviving its haunted challenge. Curious, they enter, only to lose consciousness. Mark wakes up in a strange room with 18 others, all equally confused.
A voice announces that they are part of a deadly game: one among them is a murderer, and they must uncover the killer to escape. With the clock ticking, Mark must race against time to solve the mystery and survive.