Xiao Potian has been married into the Liu family for three years, enduring endless humiliation. His mother-in-law, Long Ling'er, is gravely ill and on the verge of death, with seven cursed seals hidden in her body. Xiao Potian unexpectedly awakens the Face-Slapping Comeback System, only to discover that every time he grows stronger, his mother-in-law's lifespan shortens by a year. To save her, he has no choice but to keep pretending to be weak, living on his knees while secretly building up his strength.
As the truth comes to light, his mother-in-law is revealed to have once been the protector of Huaxia, the Dragon Mother. The curse came from the schemes of his missing father-in-law and the Shadow Hall. Forced to unleash his power, Xiao Potian burns his primordial dragon blood and embarks on the path to the Emperor Realm. In the end, he kills Ming Yuan, activates a life-sharing pact to save his mother-in-law, and opens a dimensional passage to find his biological father, who has spent twenty years guarding the world's rift.
This is the story of how a “good-for-nothing” live-in son-in-law goes from living on his knees to standing tall, fighting for his family, his dignity, and those he must protect, until he becomes a true powerhouse.