Four bodies, four random locations … who and where next?

A prominent public prosecutor is found savagely murdered. Her naked body is found with four fingers severed, a mark soldered on her chest, and vicious stab wounds. Inspector Alysha(Aly) from the Special Investigations Unit at the Federal Police Headquarters in Bukit Aman, alongside her partner, Inspector Raj, are put on the case. Aly suspects a gang killing at first but when more bodies appear with the same ‘signatures’, she fears that something more sinister is at play. She goes on to uncover a dark web of lies and lust, and finds herself on the trail of a sadistic serial killer who seems obsessed with the number four.