Mallory Moss knows the rules of middle school: Wear the right clothes, say the right things, know your place. But when Jennifer Chan moves in across the street, the rules no longer seem to apply. Jennifer doesn't care about the laws of middle school, or the laws of the universe for that matter. She believes in aliens - and she thinks she can find them. Then Jennifer goes missing. The adults say she ran away, but Mallory isn't so sure. Using clues from Jennifer's journals, Mallory searches for her friend. But the closer she gets, the more Mallory has to confront why Jennifer might have run... and face the truth within herself.