In the suburbs of Paris, Albert, a freelance reporter, vows to take revenge for the brutal murder of his young daughter while Sayoko, a Japanese female doctor, assists him in his quest for revenge. With Sayoko’sskillful guidance, the two get closer to the truth behind Albert’s daughter’s death, but it turns out that a mysterious cult and human traffickers are involved in the case. When they finally get close to the truth, Sayoko’s real intention is revealed... What is Sayoko's true purpose, and why does she help Albert to complete the revenge in such a ruthless way?