«Manifest» is based on a group of passengers who board a plane, Flight 828, and experience a period of severe turbulence during their trip. When they finally land, they’re told that it’s been five years since they originally took off and that everyone on the plane was presumed to be dead. The passengers’ sudden and inexplicable reappearance throws everything into question, especially when some of them start to hear voices and visions, which they refer to as «callings.»
The fourth season has slowly been building up to a reveal of what really happened on Flight 828. The first half of the season takes place two years after the murder of Ben’s (Dallas) wife, Grace (Athena Karkanis), and finds Ben disillusioned with the callings and consumed by his search for his daughter Olivia (Luna Blaise). Meanwhile, Michaela (Roxburgh) follows her increasingly erratic callings and tries to keep Flight 828 passengers united — and it all comes to a close with a fiery conclusion to the season’s first half.
The second half of the fourth season finds the characters facing mortality as their death dates rapidly approach. Hopefully, audiences will finally receive some clarity about what actually happened to Flight 828 — and why and how that strange bout of turbulence seemed to connect all the passengers to a mysterious spiritual force.