Matthew's attempt to rescue Diana from Juliette goes horribly wrong and Diana finally discovers just how lethal her magical powers can be. As Matthew lies dying, Diana must strike a dreadful bargain with the goddess and make the ultimate sacrificial pact with enduring consequences. A failed coup at the Congregation sees its most powerful and terrifying members go rogue, as they close in fast on Madison, where a group of daemons, vampires and witches are now residing together. Baldwin tries to alert Matthew that time is up but he can't reach him. It's a deadly race against time for Diana to take flight with Matthew before their pursuers arrive.