講述姚淳耀、嚴正嵐這對三十代的無殼蝸牛、渴望買房結婚生子的小情侶，遇上六十代終生未婚的傲嬌女楊麗音，三人意外成為房東與房客，參與彼此生活後而開啟的一連串不同世代相互碰撞的人生故事。

FANG You-cheng and LI Ching-yi, a young couple in their thirties longing to buy a house, get married, and build a family, cross paths with LIN Li-chun, a lifelong bachelorette in her sixties who appears icy and distant. Unexpectedly, they become landlady and tenants. The initial struggles of living together give way to a gradual understanding and integration into each other’s lives, fostering a close bond that surpasses familial ties.