As the truth begins to unravel, Cole and Amari learn more about the origins of the beating heart cadavers, victims physically alive, but otherwise dead. Seeking answers, Cole visits the Missions for an unsettling conversation with Mother Lucia.  With echoes of his past haunting him, Cole is ready to confront the killer, only to discover the danger is far more complex than he ever believed-and Amari's life is now at stake.