1973 In March, Hong Kong's Hang Seng Index soared nearly 1800 points. "Hard work is better than quick stock trading", and the whole city is crazy about stocks, including the Chen Delu family and a group of middle and lower class neighbors who are crowded with them at No.73 Hong Kong Street. Chen Delu is an employee of a wireless electrical appliance company, but he and his colleagues never sell many sets of electrical appliances when they go to work. Instead, they are a little crazy about stocks. His wife and his youngest son, A Cai, who is studying in college, often disclose stock information to him from the street and professors, but his eldest son, A Fu, who works in a securities company, and his wife, A Fang, who is a primary school teacher, are relatively calm. However, the stock index finally plummeted, making all people in Hong Kong "hairy crabs". At that time, there was more than one social madness and chaos: various industries locked up citizens in the form of installment payment; The police issued tickets indiscriminately, and the citizens came to them when they were in trouble, but they pushed them around and refused to take responsibility; Citizens can't rent cheap houses provided by the government, and scammers take the opportunity to cheat them of their hard-earned money; Chen Delu and his neighbors themselves know that high-level educators make money for students, regardless of whether their parents have money or not.