It's 1919, World War I has just ended, and Harry Selfridge, like many Londoners, is struggling with loss. The death of his beloved Rose has left the flamboyant entrepreneur all alone and he is making costly business mistakes. His empire is weakened, leaving him vulnerable to his old enemy Lord Loxley. Despite heartbreak and sorrow all around, the world goes on, and season three sees new characters breathe life back into the famous department store.