Ryann Bird dreams of traveling across the stars, but a career in space isn't an option for a girl who lives in a trailer park on the wrong side of town. So Ryann becomes her circumstances and settles for acting out and skipping school with her delinquent friends. One day, she meets Alexandria, a furious loner who spurns Ryann's offer of friendship. After a horrific accident leaves Alexandria with a broken arm, the girls are brought together despite themselves, and Ryann learns her secret: Alexandria's mother is an astronaut who volunteered for a one-way trip to the edge of the solar system. Every night without fail, Alexandria waits to catch radio signals from her mother. And now it's up to Ryann to lift her onto the roof day after day until the silence between them grows into friendship and eventually something more.