A documentary film on the state-owned Factory 420, also called as the Chengdu Engine Group, which was founded in 1958 to produce aviation engines. Now abandoned, the fatory is sold for millions to real estate developers to be transformed into a complex of luxury apartment blocks called 24 City. The film revolves around eight dramatic interviews that present three generations with ties to the factory: the first factory workers, more recent employees, and the children of former laborers. Woven into this oral history are three fictional monologues delivered by actors.