Thomas wants to be a hero just like the fireman who is to receive a medal from Lady Hatt. He goes around the track causing havoc trying to find disasters where there are none. Mr. Percival is holding a special winter party. All the narrow gauge engines are to deliver party supplies to Mr. Percival's house. Freddie is at the wharf with his friend Colin the crane who has never been to a party because he is fixed in place. Freddie has an idea to hold the party at the wharf so Colin can be there too. Freddie tries to reorganize everything, but in doing so the party nearly doesn't happen. Freddie sees Mr. Percival and confesses what has happened. Freddie learns that he should have asked first and is allowed to go and put everything right.