When Summer Everett makes a split-second decision, her summer divides into two parallel worlds. In one, she travels to France, where she's dreamed of going: a land of chocolate croissants, handsome boys, and art museums. In the other, she remains home, in her ordinary suburb, where she expects her ordinary life to continue - but nothing is as it seems. In both summers, she will fall in love and discover new sides of herself. What may break her, though, is a terrible family secret, one she can't hide from anywhere. In the end, it might just be the truth she needs the most.