Shen Mengjun is a 70-year-old woman who is in charge of her family's affairs and is overwhelmed by all of them. At the age of 20, she was a fashionable person even in the modern big city, but despite her singing ability, she gave up her dream for her husband, who wanted a stable life. She hates the petulant men of the first-tier cities, so she marries her husband, who teaches high school physics in a second- or third-tier city! Attracted by her husband's slender appearance and eloquent logical thinking, she marries him, only to find out that he is a man who has no knowledge of life other than physics, and is indecisive and no different from a child. For that soft-hearted do not know how to refuse, always from time to time will receive or borrow money to poor relatives husband is really depressed, Shen Mengjun weekdays the only hobby is to dance square dance, who knows, they have this piece of the square dance "dance alliance" is a moral appearance of the fraudster. Because of this, she was cheated out of a million dollars in demolition and resettlement money. Because of this group of confused old ladies can not provide any effective clues, making the detection of the case exceptionally difficult. But Shen Mengjun has long promised to give this money to her daughter Xiang Xiaoyan to buy a wedding house. Now her daughter's wedding date is approaching, she is anxious about the fire. At this time and learned that the old partner Xiang Dahai not only did not succeed in debt collection but also the ancestral treasure to the gang of relatives in debt, angry she took out a bottle of sleeping pills in front of her old partner swallowed. In Xiang Dahai carrying Shen Mengjun on the way to the hospital, Xiang Dahai surprised to find that his partner disappeared and behind his back is a 20-year-old girl. This is the beginning of a crazy fantasy journey.