Returning from a family vacation in Jamaica, the Stone family is separated onto two flights. When the later flight lands, five and a half years have gone by.

The passengers find themselves under government scrutiny as they struggle to resume their lives. Michaela is forced to confront the fact that Jared is married to her best friend.

Michaela and Ben investigate the murder of a fellow Flight 828 passenger.

Michaela and Saanvi have a similar vision, but it takes them some trial, error and teamwork to heed the call.

Flashbacks reveal how Grace, Olive and Jared coped with the loss of their loved ones after the disappearance of Flight 828.

When Cal has a calling that jeopardizes his health, Ben and Michaela set out to cure him by following the calling and looking for a missing passenger from Flight 828.