At the engagement banquet, the fiancée despises the father for being a migrant worker, and the engagement shatters on the spot! The painstakingly created design drafts for the Century Tower are stolen by a second-generation rich heir, and Lin Fan suffers a total industry-wide blacklisting. Who would have expected that the mud-covered old father is actually a national treasure-level infrastructure expert who has hidden his identity for fifteen years! When the skyscraper's foundation collapses and the city hangs in the balance, father and son join forces to break the deadlock, smash the capital's conspiracy, and guard the entire city of Jiangcheng with the backbone of the great nation's heavy industry!