Ace special agent "Guyan" accidentally soul-transmigrates to a quadrangle courtyard in Beijing in 1966, becoming Chen Xuejiao, the deeply beloved little daughter of the Chen family. The original owner jumped into an ice hole to grab new clothes and lost her life; she wakes up bound to the Happy Farm system, accompanied by a sharp-tongued husky spirit. Here, there are parents and brothers who protect her with all their hearts, greedy and harsh neighbor Aunt Jia in the quadrangle courtyard, stir-shaping First Grand Uncle Yi Zhonghai, black-hearted aunt Chen Guixiang, as well as enemy special agents inside the factory who covet technology and collude with the black market.