Episode 1 - S4.E1

When several students at Aspira Polytechnic are taken hostage by two guntoting fellow students, Insp Han and SSSgt Razali – already at the school for a talk – try to prevent a massacre from occuring. Meanwhile, the suave and charming Derek Ho, a high-flying banker, meets a girl at a supermarket. He knocks her out and takes her to his private space in an abandoned building where he kills her. The next day, he is introduced to Stephanie Szeto.