Three young lawyers are brutally slain by sword in Montreal, their bodies marked with cryptic religious symbols. To crack the case, Sergeant Detective David Savard turns to an unlikely ally: Thomas Germain-Leclerc, a theologian whose brilliance is matched only by his kindness and awkwardness. Eager to help David and his partner, Sergeant Detective Maya Merida, Thomas dives into the mystery—unaware that the truth will shake his very existence.
As bodies pile up, Thomas’ discoveries expose the killer’s twisted motives, bringing the investigators closer to his next move. Meanwhile, the series unearths the haunting past of a family raised in seclusion within a secretive sect. As faith and fanaticism collide, the final revelation delivers both an unexpected reckoning and a poignant resolution—marking the end of a cycle of violence that has lasted for generations.