When deceased loved ones begin to reappear, the people in Arcadia change forever.

Tom leads the search for Rachael, as her situation becomes increasingly dire; Maggie and Dr. Ward make a series of unexpected discoveries.

The return of the dead reaches critical mass, sending the town into chaos; Sheriff Fred implements his own agenda, triggering an unexpected siege.

Tom starts a new parish for the returned. Bellamy confesses as human bones are found in the river.

Margaret convinces Lucille to host a dinner to celebrate Jacob's return, but unexpected guests strain relations in the Langston family to the breaking point. Meanwhile, Bellamy continues to research the history of the mysterious bones, and Rachael receives unsettling news about her baby.

Margaret tries stopping Barbara from interfering with her relationship with Fred and Maggie. Bellamy struggles to keep his secret hidden, as he's forced to take desperate measures as the illness continues to spread.