Kael Lin fulfills a marriage contract, humiliated and rejected by the Zhou family. Using unparalleled medical skills, he revives the head of the Stirling Clan, uncovers the Heart Devouring Gu conspiracy, and exposes Harlan Stirling sacrificed wife and daughter for immortality. Faced with Gu sorcery threats from senior brother Tristan Lin, Kael Lin uses righteous medical practice to fight evil, upholding justice and gaining true love with Mara Stirling.