Chloe is a lonely little girl with a mother more interested in entering right-wing politics, father yearning for his old life as a rock guitarist and child prodigy younger sister. One day she meets Mr Stink, a malodorous tramp, and his clever dog the Duchess, and lets them live in the family's garden shed. 根据大卫·威廉姆斯（David Walliams）所著的畅销童书改编。臭臭先生是一名浑身散发臭气的流浪汉。克洛伊是一个普通得不能再普通的小女孩，家里有一个妻管严的爸爸、一个充满政治野心的妈妈和一个处处都更“优秀”的妹妹。每天上学的路上，克洛伊都会见到臭臭先生和他的小狗，但从未同他们打过交道。直到有一天，臭臭先生要被赶出这座城市，克洛伊毅然决定，要在家中为臭臭先生寻找一处避难所。随着她对臭臭先生的进一步了解，她渐渐发现，臭臭先生其实是个不简单的人……
