A young family receives a welcome surprise when old Uncle Ian dies and leaves them a cottage in north Wales. For Ian's nephew and his wife Ann, it seems a stroke of incredible good fortune, enabling them to leave their unfulfilling lives in the city for a newfound freedom in the remote seaside cottage. There's just one catch. Uncle Ian's will has a strange condition: the couple must care for his pet cormorant or forfeit the bequest. They think nothing of it at first: Uncle Ian was eccentric, and the bird is amusing in a way. But when the cormorant begins to show a violent and malevolent side, they soon find that Uncle Ian's gift may not be a blessing, but a curse.