A Texas town in which no one departed becomes a magnet for tourists and people; John Murphy gets an ominous warning; Kevin, Nora and Jill arrive in Miracle; Kevin and the Murphy family experience a mysterious event.
Kevin, Nora and Jill try to pick up the pieces in the aftermath of the Mapleton riots; Nora makes an impulsive choice; Kevin becomes entangled in the Murphy family's problems.
Nora awakens in the midst of an earthquake to find Kevin missing; the Murphys are left reeling after Evie's disappearance; Kevin returns home with no memory of the night before; an old enemy returns.
Three years have passed since the GR invaded Miracle. Kevin works as a cop again. Rumors rise that the seventh anniversary of the Sudden Departure will bring an apocalyptic catastrophe.
Rev. Matt Jamison takes his wife outside Miracle to seek answers about her condition; Matt struggles to keep Mary safe from desperate tourists outside the town's gates.