Fourteen-year-old Yui Ishii wanted to die. She had tried many times — until now, for the first time, she wanted to live. In a stark white room, 333 people with the surname “Ishii” are gathered. The rules are simple: fail, and you explode. Only one will survive this deadly game. Meanwhile, detectives Fushimi and Hachisuka receive a missing person report — the case of Yuuichi Ishii, a stage actor famous for his haunting performances, who vanished just before the final night of his show. What happened to Yui and Yuuichi? And why were the 333 “Ishiis” chosen in the first place!? A shocking psychological suspense that intertwines death, identity, and survival!