At 48, Tom Villeneuve is released from prison after 17 years for a crime he didn't commit. Now a lawyer, he opens a practice defending the wrongfully accused, living by the rule "Carpe Diem" - seize the day.

Greg is a police lieutenant; he must collect informations on eco-activists, infiltrating them for months. Myriam, a young free woman, is fighting to save a forest from the building of a dam. They meet and fall in love on the Zone. A beautiful life, a joy that Greg discovers, despite the risks of being unmasked. For each of them, time is short: soon everything will disappear.