Jack Ryan has a man's fists, a boy's mind, and the cunning of an ex-con. Nancy Hayes has a woman's sleek moves and the instincts of a shark. Now, in a Michigan resort town, a rich man wants Jack gone and Nancy for himself. For Ryan the choice is clear: Nancy's promises of pleasure, her crazy, thrill-seeking schemes of breaking into homes, shooting guns, and maybe stealing a whole lot of money are driving him half mad. But there's one thing Ryan doesn't know yet: his new playmate is planning the deadliest thrill of all.