Man Cheng Yun Yu Suo Huai Zhou

Qiao Huai, the illegitimate son of the Zhou family, seeks revenge for his deceased mother, infiltrates Zhou's mansion under the guise of a new concubine for the family's eldest son. But that same night, the senior master suddenly dies, and Qiao Huai is under the watchful eye of the second young master Zhou.
It would seem the game is over, but at a critical moment the third young master intervenes, and Qiao Huai remains locked in the mansion until the circumstances of their elder brother's death are clarified.
Caught between the dragon and the tiger, Qiao Huai gradually sinks into the secrets of this prosperous family, who have been buried for years...