Hunting down killers to help bereaved families get justice is more than just a job; it’s a duty for Thomas Bareski, a retired, hotshot police detective eager to reopen unsolved murder cases in a mission to find the culprits.

Charles Boulin decides to sell his small apartment on Avenue Foch to purchase a little hotel in the western suburbs of Paris. But the hotel happens to be a decaying house in Argenteuil. He wanted to surprise his wife and daughter, but it soon turns into a nightmare when they learn they have move into this shack, during the work, along with unscrupulous workers ...