The photographer and family man Matyas is married and has a happy life with his beloved wife Claire, who is pregnant and near the delivery, and his young son Pierre. Matyas was raised in an orphanage, and he believes his mother died when he was six. However, he receives a correspondence and discovers that his mother has just passed away and that he has a twin brother, Thomas. Matyas does not recall his childhood with his mother and brother and has problems with blood. When Thomas visits his family, Matyas becomes paranoid, believing that his sibling wishes to takeover his family.
