Maggie Winthrop doesn't believe in time travel any more than she believes in comic-book heroes or the tooth fairy. So when the naked Navy SEAL man appears in her backyard, saying he's come from the future to prevent a global catastrophe, Maggie doesn't buy it—despite the spark of attraction between them. But when the handsome stranger accurately predicts things no one could possibly guess, Maggie starts to doubt everything she knows to be true. Suddenly the pair is thrown into a desperate battle to ward off a future filled with disaster, and second chances for true love come at a very steep price.