Mary can prevent the devil from doing more harm, but in return she must make an incredible sacrifice. Mary tells John of her resurrection, after which she leaves him to do what is necessary to keep evil at bay.
Cotton escapes and learns something very important that could change his life. Mary, meanwhile, discovers the power of her femininity and decides to take up the fight against Satan.
Mary's penance for her betrayal takes a deadly turn while Cotton is forced to perform an exorcism of his own.
Mercy wants to rule Salem alone and uses Hathorne to do so. Anne is pregnant and being tortured by the devil. Cotton therefore returns to save and protect his unborn child and Anne.