When Grace and Cal are involved in a suspicious hit-and-run, Ben is determined to get to the bottom of it; Michaela investigates a brutal attack at the Church of the Believers; Zeke tries to make amends with someone from his past.
A commercial airliner suddenly reappears after being missing for five years. As those aboard reintegrate into society, they experience guiding voices and visions of events yet to occur, and soon a deeper mystery unfolds.