Leo Valdez has moved from foster home to foster home, but one foster home seems to make a great effect on him, and that's with Katelyn Gragg. Katelyn and her best friend Lux grow an unbreakable bond with Leo, or at least that's what they think. One day when Leo leaves, Lux's life is changed, and not in a way she had hoped it would. What happens when she is taken to a mysterious camp four years after Leo's disaperence? And why is Leo at the camp with her...worst of all, why can't he remember her?