DI Maguire is on the trail of the red rose burglars.
They have been stealing valuable jewellery from some fancy houses. They seem to arrive and depart on the bus.
The only common link apart from the red rose they leave behind at the crime scene. A certain jeweller called Carter supplied some of the valuable items.
The police keep watch at Carter's shop but they draw a blank.
The crooks have placed hidden microphones in his shop to listen in on some of his valuable sales.
They also hope that other thieves will copy the red rose gimmick causing confusion with the police.
There is a snoopy woman hanging outside their flat. Maguire is confident they will make mistakes. He has a hunch about the microphones.
The crooks were not as smart as they thought. One of them took a liking to violence and the other got increasingly nervous.
A routine thriller, it was astounding that the crooks were banking on the buses being on time.