As his colleague Sergeant Doakes grows suspicious, Dexter is forced to lie low, slipping deep into domestic bliss. He says all the right things to his girfriend and plays Kick the Can with her two children, but Dexter can only hide his true self for so long. The fiend inside him is calling out, ready to be unleashed. When a new psychopath begins slashing his way through Miami, the temptation becomes too much to bear.