Lin Mange, a righteous and smart medical student, sneaked into the Lu family to avenge the tragic death of his friend Lan Lan, and became the eldest young master's fiancée. However, he was secretly discovered by the fox-like second young master Lu Haoran and started a series of torture and counter-murder.While getting along with Lu Haoran, he was attracted by his disguised sincerity and justice. The two went from suspicion to trust to love, and finally found the story of justice and truth.