Freelance photographer Mo Xiangbei and his childhood sweetheart boyfriend Mu Yinan originally had an enviable love story. The two were about to welcome the fruit of their love. However, unexpectedly, Xiangbei discovered that actress Cui Wanqing had been cheating on her openly and secretly.Mu Yinan secretly flirted with her, and the two of them had numerous quarrels. Finally, on Cui Wanqing's birthday, Mo Xiangbei received a heavy blow in his life, and finally went to Dali alone and opened a restaurant called “Regret”.The inn unfolds the story of life redemption.