On a rainy night in 1996, an ashtray smashed through the glass of the Good Neighbor convenience store, shattering the life of the store owner Chen Zhiming. To protect his family, he was forced to walk into the shadows, from three coins to a smuggling empire, from transparent glass to bulletproof walls. For twenty years, he built high walls, but trapped his wife and daughter from the truth. When his daughter put on the police uniform and his wife pressed the record button in the Buddhist hall, he realized that once some walls are built, the first person to imprison them is the person who built the wall.