This contemporary drama follows whip-smart doctor Mona Harcourt who lives in London with political lobbyist husband Guy. When a bomb goes off in London on the same day that her brother, Kareem, is abducted and murdered in Pakistan, Mona's charmed life is shaken to its core.

A unique story told over two distinct halves, "Summer" follows Sam, a man drawn to a mysterious island off the British coast where he encounters a group of islanders set on preserving their traditions at any cost. "Winter" follows Helen, a strong-willed outsider who comes to the island seeking answers, but whose arrival precipitates a fractious battle to decide its fate.