This season features a live-action version of the game Cluedo. In this, the legendary idol group, Tiger Moth disbanded but its popular leader Na Gasu was making his first solo debut 20 years later with his comeback song "Death". On the day of his showcase Na Gasu suddenly disappeared, with his last-known location being in the concert hall. All of TWICE were given a character to play: Nayeon as CEO Lim, Jeongyeon as Journalist Yoo, Momo as Mo Joyeon, Sana as Director Kim, Jihyo as President Park, Mina as Photographer Jeong, Dahyun as Composer Kim, Chaeyoung as Stylist Son, and Tzuyu as Joe Road. The members will need to find evidence in the concert hall in order to find out what happened to Na Gasu and in every round, the members have to vote on a suspect who they think killed Na Gasu.