Something odd is going on at the Fetch Brothers Golf Spa Hotel. Receptionist Bryony Mailer has noticed a definite tendency towards disappearance amongst the guests. Shes tried talking to the manager, shes even tried talking to the owner who lives in one of the best cottages in the grounds, but to no avail. And then a tall, loping remarkably energetic guest (wearing a fetching scarf and floppy hat) appears. The Fourth Doctor thinks hes in Chicago. He knows hes in 1978. And he also knows that if he doesnt do something very clever very soon, matters will get very, very out of hand.