Eighteen-year-old American, Wren, is stranded in England when news of an impending world-ending comet causes global chaos, but when she meets a runaway prince with an agenda of his own, she realizes he might be her only chance of getting home in time to say goodbye. Wren, an American in London, is at the airport when she helps Theo escape a pack of tourists-- and finds out he is a run-away prince! He owes her a favor, and when news breaks that the Earth is ending in eight days because of an approaching comet, she takes him up on it. She'll be his bodyguard from London to his family's compound in Santorini, and he will charter her a private jet home in time to say goodbye to her family. -- adapted from jacket