A man and a woman make separate journeys to a mysterious island off the British coast.
Cast: Katherine Waterston, Emily Watson, Paddy Considine, Mark Lewis Jones, Joe Blakemore, Amer Chadha-Patel, Freya Allan, Börje Lundberg, Stanley Auckland, Tom Lawrence, Sonera Angel, Will Rogers, Naomie Harris, Jude Law, Charlotte Gairdner-Mihell, Paul Kaye, George Potts
With a battle for power brewing, Helen and her family find themselves trapped in the middle.
Helen tends to a fateful birth and is questioned about her past, while a peculiar girl rouses Ellie's interest.
Helen surprises her two daughters, Tallulah and Ellie, with a trip to Osea Island for Ellie's birthday. After finding that the cottage she booked is suspiciously no longer available, Helen scours the island for a place to stay, but finds resistance at every turn.
Sam is shocked to learn the truth about his connection to Osea and the islanders’ intentions for his future. Later, in a fight for his life, Sam tries desperately to escape their clutches and make it back to the mainland in one piece.
As Sam continues to look for a way off the island, he and Jess stumble across a series of bizarre events.
Sam is drawn to a mysterious island off the British coast. There he discovers an idyllic world from which he finds himself unable to leave. Isolated from the mainland, the rituals of the island begin to overwhelm him, immersing him in a quest in which he grapples with his traumatic past.