10集衍生剧里Sophie（Hilary Duff饰）向儿子讲述自己是如何认识另一半，就像母剧里Ted Mosby所做的事。《老妈老爸的浪漫史》背景设置在21年，除了描述女主的寻爱故事外，主角及朋友们亦会探索自己的生活，共同于这个被约会软件主导的时代找寻爱情。
In the near future, Sophie (Duff) is telling her son the story of how she met his father: a story that catapults us back to the year 2021 where Sophie and her close-knit group of friends are in the midst of figuring out who they are, what they want out of life, and how to fall in love in the age of dating apps and limitless options.
