Hoping to slip back unnoticed, Angus is reluctantly returning to North Uist for his grandfather’s funeral after a decade away. Instead, he finds himself trapped on a ferry with his ex-girlfriend Màiri, her fiancé Colin and her formidable mother Margaret. When engines fail in the notorious waters of “Wolf Bay”, tensions rise, old grudges resurface, and crew begin to disappear. Forced to confront an inheritance he never wanted, Angus must fight for survival as the terror stalking the decks closes in.