Uninhabited and remote, Sweet Friday Island rises out of the Sea of Cortez, the flattened top of an ancient mountain. Its rugged terrain makes it the perfect place for fifteen-year-old Peg Toland and her adventurous dad to take their favorite kind of vacation. But its idyllic isolation and wild landscape ultimately turn Sweet Friday Island into a terrifying and deadly trap. Inexorably forced into fighting for their lives Peg and her father are suddenly struggling as well with a question many of us pose but need never answer: Are we really capable of killing another human to protect someone we love?