Officer Nick Beroff, 17 years of service for Montreal's police, is not happy to be stuck with Ben Chartier, newly transferred from S.Q (provincial police), as a partner, but after the tragic event that occurs in the first scene of the pilot, he will have to come to terms with the fact that together, they are now the second patrol of station 19. As the mystery around the catalytic event that starts off the series deepens, the everyday life of the policemen doesn't lack in action, tangled in emotional baggage and dirty secrets.