Terry Ainsworth is more interested in train spotting than going to school, and he is happy when his father Eddie takes him on a train ride. Little does the boy know that his father, who is fresh out of jail, is planning to steal a lot of fur coats and he wants to check out the railway line for the best spot to do it. It does not matter to him that his wife Molly is working at the company which produces the fur coats. Greengrass is doing some gardening for Mr. and Mrs. Dobson when he finds some old, Roman coins. Convinced there are more where they came from he rents an excavator to do some serious digging for them while the Dobsons are away for a couple of days.

Somebody breaks in at John Harper's cottage and swaps the old, blind man's money with blank pieces of paper. The only visitor Harper can think of is Albert Ross. There is nothing but trouble with Ross. All he thinks about is money and how much it will cost him when his men are not working. When the police cannot do anything after yet another accident at his farm the workers take matters in their own hands. Furthermore Nurse Cassidy suspects that Ross beats his grownup daughter Juliet for seeing the worker Josh. David spots a naked man running through the woods. Later he and Aunt Peggy see the man throw himself from a bridge. Only David's actions save him from drowning and now the man sees David as his guardian angel. When Aunt Peggy discovers his true identity she tries to cash in on it.