A renowned, daredevil female astronaut falls in love with a shy, bookish man who runs a small town library. During a mishap on a space mission, she gets stuck in a time loop where every 24 hours she relives her last day on Earth, forcing her to reevaluate her life, ambitions, and the love she left behind. Through heartbreak and revelations, she learns the bittersweet truth of love's power over time.