连姆（乔什·怀特豪斯 Josh Whitehouse 饰）和娜塔莉（弗雷娅·梅弗 Freya Mavor 饰）是性格大相径庭的一对男女，这两个本来八竿子打不到一起的人，却在机缘巧合之下相遇，并且迅速的坠入了情网之中，他们都认定了彼此是自己这辈子要携手度过的那个人，在激情燃烧的恋爱之后，他们很快就携手步入了婚姻的殿堂。
　　一晃眼十年过去，再摧残的爱情都禁不住这漫长时光的消磨，当连姆和娜塔莉之间的感情消磨殆尽之后，或许体面的结束是他们最好的选择了。在决定分开之际，他们开始分割财产，其中包括两人珍贵的音乐收藏，而在此过程中，熟悉的一首首歌勾起了他们对于曾经的回忆。

　　This final series chronicles Harry’s epic rollercoaster ride as he begins to lose grip on his empire, alongside the fortunes of all those whose lives he has touched. London, 1928. Nine years have passed and Harry Selfridge is at the pinnacle of his wealth and celebrity and enjoying the frenzy of the roaring 20s. But in this buzzing, fast-evolving world, Harry is splashing his cash in an unprecedented, dangerous way. As he parties and gambles with stage stars, the Dolly Sisters, and pursues risky new business ventures, the trials and tribulations of our other much loved characters, and a handful of newcomers, also unfold. Lady Mae returns to London to rebuild her life whilst Mardle and Grove thrash out their differences, and Kitty and Frank embark on the biggest challenge to their relationship yet.