Fan Si'er, a middle-aged man who was obsessed with the art of cross-talk, lived alone in a small courtyard. One night, he welcomed two young girls, Chen Xiao and Qing Qing Qing, who were hurriedly taking the little boy with them. Always happyFan Si'er, who was helping others, stepped forward to help but was met with cold words. The three people who live together but have a generation gap have conflicts in their initial shared life, but they are unable to drive each other away. Pain, oneUntil the two girls left their little brother alone at home and rushed back, Chen Xiao saw Fan Si'er, who was in harmony with his brother, and felt the long lost fatherly love from him. However, life experiences are challengingThe bumpy Qingqing was full of guard against Fan Si'er, afraid that he would deceive his friends. So, a unique love triangle happened in the small courtyard.