TWS is the name of a gang consisting of 6 men, namely Shinyu, Dohoon, Youngjae, Hanjin, Jihoon, and Kyungmin. They study at PLEDIS High School and they are all in Dohoon's secret room because Dohoon is the son of the school owner and suddenly when they leaving the room they were shocked to see many people attacking each other looking like zombies and they went back into the room and locked the door