A teacher must put aside his personal traumas to rally his school in a fight for survival against a group of violent, possessed students.

Hakin, an undercover police officer, has long infiltrated the Harimau Merah gang. Although he wishes to end his mission, Inspector Nazri urges him to continue in order to combat crime. Conflict arises when Bos, the leader of Harimau Merah, is murdered by his brother, AhB, who aspires to become the new leader. Hakin investigates AhB's operations, including the brutal murder of Uncle Hazim and the smuggling of drugs using foreign migrants.

Hakin, a police officer goes undercover and infiltrates the Red Tiger gang and manages to gain the gang's trust. Hakin not only succeeds in uncovering their crimes but also has to face the brutal criminals. However, he is betrayed, plagued by moral dilemmas and his loyalty is tested as he fights to uphold justice without his identity being known.