Leo Sterling, a descendant of the Azure Mystic Sect, descends to fulfill a marriage contract. He disguises himself as a beggar. The wealthy family marries their seriously ill eldest daughter to him, wanting to get rid of a burden. No one knows this mocked beggar can save patients with golden needles and repel enemies. Moved by the girl's kindness, he cures her illness, confronts the wealthy family, creating a legendary counterattack.