After a fateful and unexpected encounter, the son of Jiangnan's wealthiest man falls for the icy beauty Huai En, but she hides a secret.
Huaien, disguised as a woman, escapes with a registry, but is drugged with an aphrodisiac after Jin Xiaobao saves him from danger.
Jin Xiaobao discovers Huaien's true identity but vows revenge after a wild night, while Huaien secretly seeks financial records.
Jin Xiaobao tries to seduce Huaien, but finds his scars and pities him. Huaien is torn between his mission and growing feelings for Xiaobao.
Huaien saves Jin Xiaobao’s father, gaining his sympathy. They grow closer, but Huaien is torn between duty and love.
Huaien saves Xiaobao but loses the registry. Meanwhile, Xiaoyu is missing, and Huaien discovers the registry hidden with her.
Huaien humiliates Xiaobao, takes the registry and Xiaoyu, but spares the Jin family. Xiaobao must now poison Huaien to save his family.