An intense desire for revenge fills Albert Bacheret: his daughter Marie. This father, exalted by violence, joins forces with Sayoko, to find and kill the culprits one by one. But at the same time, Sayoko leads her own mission of revenge which risks turning against Albert at any moment… Sayoko Mijima, a Japanese therapist based in Paris, helps Albert Bacheret find the murderer of his eight-year-old daughter who was killed by members of the Circle, a mysterious association involved in the trafficking of children’s organs. Together, they kidnap several suspects in turn and lock them in a warehouse to extract information from them. Between the quest for truth and the thirst for revenge, the duo will soon find themselves locked in a vicious spiral.