Lan Xiaoan is a girl whose smile is not obvious, at least she thinks so. Leng Lingbai is an aspiring young man who commits two crimes. Mo Bai and Ling Yiming are good friends, at least that's what Lan Xiaoan and Leng Lingbai think. She was inexplicably mistaken for a love rival and was said to be cold. Who knew how much Lan Xiaoan wanted to laugh out loud? She also tried hard to make a laughing expression, but why couldn't she do it? Every time Leng Lingbai watched Lan Xiaoan make an expression in front of the mirror, she would always think of her childhood. In 2000, her brother died in a car accident in order to become Lan Xiaoan's girlfriend. Grandma Leng went crazy, and Lan Xiaoan became facial paralysis. After 10 years of hard work by Leng Lingbai and her dead brother's twin brother Leng Lingyu, Lan Xiaoan can make all expressions except smiling. When she met Ling Yiming and Mo Bai, she suddenly felt that she wanted to laugh! ! For Leng Lingbai and Leng Lingyu, she wants to laugh! ! So! "Please! Please make me laugh!"