The day the stars fell, two lives changed forever. High schoolers Namjoon and Seokjin are complete strangers living separate lives. But one night, they suddenly switch places. Namjoon wakes up in Seokjin's body, and he in his. This bizarre occurrence continues to happen randomly, and the two must adjust their lives around each other. Yet, somehow, it works. They build a connection and communicate by leaving notes, messages, and more importantly, an imprint. When a dazzling comet lights up the night's sky, something shifts, and they seek each other out wanting something more - a chance to finally meet.