Driven ashore by hunger, a female giant squid brings terror to a remote Scottish fishing village. Back in the sea she meets Jamie, a young diver enthralled by the water, who sparks a primal reaction. But does she need a meal or a mate? Tensions rise as the community struggles to understand and deal with a mystery, a threat and a cold-hearted attempt to kill or capture the creature. In a battle for survival, justice and the environment, Jamie, aided by a beautiful Spanish vet, fights desperately to save the squid, as the story builds towards its final, gripping climax.