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.
After waking up in a strange house, still tripping and scared, Sam is determined to escape and flee the island for good. But, what more secrets lie in Osea?
Helen and her two daughters, Ellie and Talulah, travel to the island for surprise birthday trip, but find themselves faced with hostility and resentment from the locals.