"Love in the Deep House" is set against the backdrop of the Lu family, a prominent family in Lincheng in the 17th year of the Republic of China. It tells the story of Lu Mingxuan, the third young master who returned from studying in Peking and returned to the deep house where human nature was imprisoned with new ideas. For the benefit of the family, his father, Lu Hongnian, forced his eldest son, Lu Mingcheng, to marry Chen Wanqing, a merchant girl while his sick wife Lin was still alive, to fill the house and use dowry to make up for the shortfall.
Mingxuan saw his eldest sister-in-law, Lin, withering under the ethics and illness, and gradually became rebellious. He discovers that Wanqing is not willing to be a pawn. The second brother Mingzhe seems to be meek but is protecting his illegitimate sister Nianwei. Old family secrets and the struggle with human nature gradually emerge.
From resisting arranged marriages to helping others break free from bondage, Mingxuan, Wanqing and others finally break the confinement of the deep house in their own ways in the collision of old and new ideas, allowing the glimmer of light to penetrate the haze, reflecting the individual's pursuit of freedom and dignity.
