In this bloody and violent Japanese action thriller from the makers of The Raid, a serial killer based in Tokyo murders women and posts videos of the deaths to YouTube. He notices a similar video posted by a man in Jakarta named Bayu. Bayu's killing was in self-defence, but in an odd sense of blood lust he posted the murders online. The serial killer believes he's found his soul mate and tries to get the normally mild-mannered journalist Bayu to embrace his new found murderous streak.