Cai Yumeng, a homebody, had a serious car accident a few years ago, which resulted in brain surgery. Since then, her temperament has changed drastically, and she gets angry accidentally. Parting ways with family, leaving friends without saying goodbye, and breaking up with bosses on bad terms. With no income, she faced the biggest test in her life. At this time, she suddenly traveled through time and came to Hong Kong in 1989 with hesitation and uneasiness, and became a man. In the midst of her regrets, God gave her another chance to choose. Would she rather go back to 1989 or stay in 2016? Can she change everything she has?