Pierre and Lucie are siblings who feel as though their bodies are two halves of a whole. They share everything, from their time spent away from home to their sexual conquests amongst friends. When they are not discussing the emotions they share, they play in their rock band, go to clubs, get drunk, and share their bodies amongst a close-knit group of male friends. As adolescent urges and hormonal impulses reach boiling point, tensions begin to fray. One day, Pierre does not come home. With Lucie growing ever more desperate to find him, and rumours of a crime circulating, she decides to take matters into her own hands, using her new found sexual prowess to try to obtain answers in a perverse microcosm of a teen society that has until now remained out of sight, out of mind.