During a terrible thunderstorm several people claim to have seen an UFO flying over Aidensfield, and sergeant Blaketon cannot just dismiss the matter because PC Ventress is one of them. Ventress even thinks he was abducted. Bernard and Lily Conway have trouble with their neighbour Ted Halliwell and suspect him of knocking over their milk cans and letting his sheep lose during the storm. Then Conway disappears after an argument with Halliwell. Aunt Eileen has been collecting money for charity on behalf of Hester Jarvis, but when the money gets stolen Jarvis does not want the theft investigated.

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.