Her billionaire mentor's invitation to go sailing with his family seemed a timely break for diver Katsu "Kat" Espinoza. Until she saw the yacht's captain—Will Ashton, her treacherous, still-too-appealing ex—and her mentor made a shocking announcement: Kat was his newest heir!

She could handle the angry accusations, the ice-cold shoulders. But when the boat was wrecked, stranding them all on a deserted island, Kat suspected that someone had a more permanent solution in mind. With the survivors looking to her for leadership and Will being maddeningly secretive, Kat considered who among them might be truly dangerous.

Then the survivors began to disappear, one…by one….