Rhoda Williams, a bright young student, has aspirations of studying astrophysics when another Earth is discovered in the sky, a mirror of our own planet. One night, while driving home from a party, Rhoda becomes distracted by this celestial phenomenon and causes a tragic car accident that kills the wife and child of a composer named John Burroughs. Sentenced to four years in prison, Rhoda is tormented by guilt and searches for a way to atone for her actions once released.

Upon her release, Rhoda seeks out John, who remains unaware of her identity, and takes a job as his house cleaner, hoping to find redemption through helping him recover from his loss. Meanwhile, news spreads about a contest to win a trip to the other Earth, sparking Rhoda’s curiosity about the lives that might exist on this twin planet. As Rhoda and John grow closer, both are drawn to the mystery and possibilities that the other Earth represents, exploring themes of grief, forgiveness, and the chance for second chances.