Having been unwed all her life and skeptical of love, Lee Youngsoo's phone rings to notify her of a dating app with a 98% success rate with a man. Giving it a chance, she experiences defeat in losing the man to another woman. Enraged, she confronts the app's office where she meets an elderly man. As night arrives, he suddenly transforms into Wolyoung Seon, the god of the moon, who claims they are meant to be together. It seems everyone has a predetermined partner, but who could have guessed that her match would be a divine entity?