Freelance photographer Mo Xiangbei and his childhood sweetheart Mu Yinan originally had an enviable love story and were about to welcome the fruit of their love. However, due to an accident, Xiangbei discovered that actress Cui Wanqing had been flirting with Mu Yinan, overtly and covertly. The two had countless quarrels, big and small, and finally on Cui Wanqing's birthday, Mo Xiangbei suffered a major blow in his life. He eventually went to Dali alone and opened an inn called "Regret", unfolding a story of life redemption.