Romy Silvers never knew how isolating the universe could be until her parents' tragic deaths left her alone on The Infinity, a spaceship speeding away from Earth. Romy tries to make the best of her lonely situation, but with only brief messages from her therapist on Earth to keep her company, she can't help but feel like something is missing. It seems like a dream come true when NASA alerts her that another ship, The Eternity, will be joining The Infinity. Romy begins exchanging messages with J, the commander of The Eternity, and their friendship breathes new life into her world. But as The Eternity gets closer, Romy learns there's more to J's mission than she could have imagined.