In the superpowered city of Yuandu, ordinary live-in son-in-law Chu Xiaotian is picked on by a villain and accidentally awakens the Working-Class System. By completing tasks like "laying bricks" and "hauling cement," he boosts his attributes and earns skills. With unconventional moves like "Bricklaying Armor Break" and "Steel Muscles and Iron Bones," he crushes superpowered opponents and gradually becomes the "Emperor of Laborers." Along the way, his former friend Qin Hao becomes corrupted in his pursuit of power and joins the dark web to commit crimes. Chu Xiaotian must hide his identity as a live-in son-in-law while dealing with the villains' schemes. In the end, he saves Yuandu with the System's ultimate skill, "Bricklaying to Vanquish Enemies," and becomes a legend in the world of superpowers.
