An asteroid is going to strike the Earth in a week and three teens must decide what do with their last week. Zan and Caden grew up on Martha's Vineyard year-round while Sienna used to come here during the summers. Zan must decide whether or not to investigate a girl's phone number she found in a book that her dead boyfriend Leo gave her before he died. Caden has to deal with being kidnapped by his estranged father and finding out that his sister is really his half-sister. Sienna has to figure out what she wants from her life when her dad brings the family back to Martha's Vineyard and she falls in love with Owen, a childhood friend she used to play on the beach with. This book deals with love, loss, and family. It made me think, what would I do if I only had a week left to live?