 It s Una s first day of school ever. Because she doesn t understand that you re not meant to talk loudly, she gets Pax, Keitu and herself into detention. T-Man didn t get into trouble, but when a vicious acid-rain shower starts, all four of them are trapped in the school. And when the school s roof starts leaking the burning acid, the gang have to think fast and get over their arguments if they want to survive.