While policeman Shen Mengxing escorted the prisoner Liu Daniu to the provincial jail, they were kidnapped by the female robbers, Yu Niang and Xue Die, from Longmen Mountain in Longmen County. The two were captured to the mountain and became members of the cottage. The new cottage was renamed "Longmen Cottage". Yu Niang is the master, Shen Mengxing is the second master, and Liu Daniu is the third master. Then Yu Niang arranged Shen Mengxing and Daniu to go out and invite Lu Linxiao, a teacher at Longmen College, to come to the cottage as a consultant. Everyone worked together in order to make the business much better, but they wrongly used all kinds of bad methods, which led to many misunderstandings and a series of hilarious embarrassments. Once Lu Linxiao asked Daniu to help bring a letter to his father, and Daniu rescued a fisherman's daughter, Wan Er, on the way to Lu's residence. After listening to Wan Er's experiences, everyone in the cottage was filled with anger and motivation and determined to help Wa