World's No.1 billionaire Zhao Jianming disguises as a crippled beggar to find his lost sister, Zhao Xiaoyu. She accepts him, but her cheating husband, cruel mother-in-law, and mistress steal her patent, leaving her nothing. Jianming goes undercover; No.2 billionaire Jiang Han guards her as a delivery rider. Identities explode, villains fall, and the siblings reunite after twenty years.