Lin Li's daughter Si Yuan finds out that her father is having an affair with tuition teacher Yu Ting. Unable to forgive her father, Si Yuan wrecks Yu Ting’s laptop. Lin Li presses Chen Shi, he tells her it has nothing to do with Yu Ting and that their marriage had problems since long ago. Lin Li goes to the playground; Dong Sheng recognises her as the big sister who helped him when he was a kid...