When Selly's father leaves her high and dry in the port of Kirkpool, she has no intention of riding out the winter on land while he sails to adventure in the north seas. But any plans to follow him are dashed when a handsome stranger with tell-tale magician's marks on his arm boards her ship, presenting her and the crew with a dangerous mission: to cross the Crescent Sea without detection so he can complete a ritual on the sacred Isles of the Gods. What starts as a leisure cruise will lead to acts of treason and sheer terror on the high seas, bringing two countries to the brink of war, two strangers closer than they ever thought possible and stirring two dangerous gods from centuries of slumber.