Life always has regrets, but the protagonist seems to have an extraordinary amount of them. She got fired by her boss, broke up with her boyfriend whom she dated three times, was caught in a sudden heavy rain and got soaked, had an allergic reaction that sent her to the hospital. In fact, this middle-aged woman feels like everything is going wrong, and every day seems terrible. If you could go back to yesterday and redo something you regret, would you? That's exactly what happens to the protagonist when she encounters a mysterious psychologist who claims to be able to send her back in time. The first time, the protagonist returns to her high school dance, aiming to resolve and change an issue that impacted her entire life. But did she succeed? Can all the regrets on her wishlist truly be altered?