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