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.

Cast: Naomie Harris, Katherine Waterston, Emily Watson, Paddy Considine, Nico Parker, Charlotte Gairdner-Mihell, Paul Kaye, Freya Allan, John Dagleish, Mark Lewis Jones, Börje Lundberg, Sonera Angel, Joe Blakemore, Lauren Byrne, Anna Calder-Marshall