The third and final season of the supernatural horror series "Salem" deals with the aftermath as the Dark Lord (Oliver Bell) rises to power. His plan is to build a New World devoid of Puritan values, which grants him the approval of many witches. Unfortunately for them, he also secretly wants to destroy all of humanity, starting in Salem. However, Tituba (Ashley Madekwe) has a terrible vision of hell on Earth and finds out the only person who can stop the devil is Mary (Janet Montgomery), who died saving John (Shane West). Their quest for the season is to find a way to bring Mary back from the dead and free Salem from the Dark Lord. Meanwhile, Isaac (Iddo Goldberg) tries to get revenge on Mercy (Elise Eberle), who is now running the brothel; and Anne (Tamzin Merchant) keeps her husband (Seth Gabel) imprisoned.