Old Luo, a non-governmental scientist, has devoted himself for many years to studying a variety of strange inventions and creations, and has built his own underground city and laboratory in the factory compound. Unexpectedly, Old Luo's wife and son, and turned against his old friend Boss Zhao. In order to regain his dignity, Old Luo decided to use extreme means - dig a tunnel to sneak into the Zhao family and steal back 400000 CNY belonging to his neighbors At the same time, when he was studying in Beijing, Luo's son, Young Luo, had a crush on Yue Zhao the daughter of Boss Zhao, who was always lovelorn. He began a "revenge plan" that coincided with his father. He wanted to "cheat money and sex.".
—official