Inspired by screenwriter Carolyn S. Briggs' memoir This Dark World, a tight-knit spiritual community is thrown off-kilter when one of their own begins to question her faith, love, and trust - in human relationships as well as in God.
| Actor | Role |
|---|---|
 Vera FarmigaCorinne Walker | Corinne Walker |
 Donna MurphyKathleen Walker | Kathleen Walker |
 Dagmara DominczykAnnika | Annika |
 John HawkesCW Walker | CW Walker |
 Joshua LeonardEthan Miller | Ethan Miller |
 Nina AriandaWendy Walker | Wendy Walker |
 Taissa FarmigaTeenage Corinne Walker | Teenage Corinne Walker |
 Taylor SchwenckeYoung Wendy Walker | Young Wendy Walker |
 Boyd HolbrookTeenage Ethan Miller | Teenage Ethan Miller |
 Norbert Leo ButzPastor Bill | Pastor Bill |
 Bill IrwinPastor Bud | Pastor Bud |
 Michael ChernusNed | Ned |
 Ebon Moss-BachrachLuke | Luke |
 Sean MahonLiam Donovan | Liam Donovan |
 Jack GilpinDr. Dick Adams | Dr. Dick Adams |
 Molly HawkeyMolly | Molly |
| DDannielle RoseGabe's Teacher (uncredited) | Gabe's Teacher (uncredited) |