Edwin promised to his sister on her deathbed to find her son she gave up a long time ago. Edwin's quest brought him to become a substitute teacher in Duri High School, Jakarta, a school for juvenile delinquents. There he must face the most violent students to find his nephew. When he eventually finds the boy, a city-wide riot erupts and Edwin is trapped in the school with the cruel kids out for his blood.

After her twin sister, Fara, committed suicide, Rea decided to find out the cause of Fara's death by disguising herself as her sister. However, the investigation did not go smoothly and actually resulted in disruption in his life. Starting with his mother, Rianti, who started experiencing frequent mood swings. Fara's best friend, Suki, apparently hates her, and the guy Fara is secretly dating, Reyhan, starts to suspect her.

When a grim organ trafficking case is linked to his younger brother's high school, rookie police officer Arshaka goes undercover as a student to investigate. He soon discovers he can't do it alone and forms an unlikely alliance with a group of students to help him. Together, they work to expose the school's dark secrets, leading them to a shocking revelation that the culprits are powerful figures, some of whom are dangerously close to them.

Dozens of students died gruesomely during the last school exams. It started with one of the students being possessed and harming the others. The devil's power threatens their lives.