Park Sun-woo is a successful news anchor who discovers nine magical incense sticks that allow him to travel back in time exactly twenty years. Driven by the desire to uncover the truth behind his father's death and his brother's tragic fate, he begins to alter past events. However, he soon realizes that every change he makes in the past has profound and often devastating consequences on his present life and the people he loves. As Sun-woo navigates the complexities of time travel, he finds himself in a race against time to fix the ripples he has created. The series explores themes of destiny, regret, and the moral implications of playing god with history. Alongside his colleague and love interest, Joo Min-young, Sun-woo must confront the dark secrets of his family's history while fighting to preserve the future he desperately wants to protect.