Mickey Mouse and Donald Duck go on holiday to Great Britain to stay with Mickey's friend Sir Reginal at his castle in the country. Donald is slightly disappointed because knowing Great Britain is an island he is surprised not to see palm trees, a pool and the sea. Mickey has to tell him that it is not a tropical island.
Sir Reginald dines them before they retire for the night with Donald still thinking that he should be surfing, diving and waterskiing. 'Maybe you'll feel differently after a good night's sleep.' Sir Reginald tells him.
But things go bump in the night when the ghost of Sir Chauncey, dressed in a full suit of armour, appears in their bedroom and tells them they must do something for him if they wish to carry on sleeping in that particular bedroom. Donald is so frightened that he tells the ghost, 'Anything you say, sir.' So the ghost tells them they must go to London the following morning and bring back to him some souvenirs that he names.
At breakfast the next morning they tell Sir Reginald about the ghost and he expresses astonishment that they have a ghost in the castle but he encourages them to visit London and gather the eight things the spirit wants. They ask him to accompany them but he is too busy so is unable to do so.
They tour round London seeing the sights and having adventures along the way. They gather each item that Sir Chauncey's ghost has demanded. And on their return Donald admits to Sir Reginald that the ghost has done them a big favour because they both enjoyed the day immensely.
Going up to bed Mickey and Donald sit in their chairs waiting for the ghost to reappear but they fall asleep and are awakened by a crash in the early morning. It is the ghost and they give him the souvenirs so that he can stop haunting them.
At this point they have a huge surprise as they discover that it was all a huge joke and the ghost was actually …
Whatever, they later agree that their visit to London was very educational and that they had gathered lots of souvenirs to remember it by.
At the end of the story there are two pages headed 'Do You Know …?', which give interesting facts about London, all with appropriate illustrations, nicely done by the Disney studios.