In 1996, 12-year-old best friends Charlotte and Raven made a promise to each other. Years later, when a high school reunion reunites the two, a secret threatens to complicate their childhood commitment and forces Raven to reevaluate her increasingly complex feelings toward her friend.

After five years in a coma following a fatal car accident, Madison Neubauer wakes to find her home and family in the grip of 'The Observance', a religious cult who will stop at nothing to protect their secrets.