As the Stone family reels in the aftermath of a devastating shooting, they’re hit with their most foreboding Calling yet, sending Ben on a mission to locate two Flight 828 passengers who have mysteriously gone missing. Grace grapples with her new pregnancy, the Major attempts to tighten her grip on the unwitting Saanvi, all while the clock on the lives of the 828ers continues to tick towards zero.

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, but finds her efforts stymied by Adrian's refusal to cooperate. Zeke is tested when he tries to make amends with someone from his past.