When an eccentric homeless man jumps to his death in Old Montreal, the police discover two wallets in his possession: those of a retired psychiatrist who was recently murdered in a bizarre ritual and a powerful corporate lawyer who has vanished. As police detective Victor Lessard and his partner, Jacinthe Taillon, work to solve the separate mysteries, a dark history begins to emerge. While the pressure builds and the bodies accumulate, dark and disturbing secrets come to light about a pivotal moment in Quebec’s history. But will Lessard and Taillon crack the case in time to prevent the killer from striking again?