Six months ago, his life was stolen, his wife, his daughter, butchered while he watched. Haunted by grief and driven by vengeance, he hunts the men responsible. But as his plans grow darker and his methods more brutal, he begins to question what's left of the man he used to be. Is justice worth becoming the monster he's chasing? One By One is a gripping psychological thriller about obsession, loss, and the thin line between justice and madness.