Paul and Barry install a safe for Dan the Van's Gran and discover a priceless ruby and some suspicious dinner guests.

The ruby has gone missing, so Paul and Barry visit the mill owner, Tatlock, who they believe to be the most likely suspect, on his own teritory.

Paul and Barry go to the second suspect on their list of suspects, the suave Carrington-Smythe. Rather than tackle him direct, they search his flat for clues.

Carrington-Smythe reveals Paul and Barry's mission and sets them on the trail of Professor Rex Frimley.

With the Professor kidnapped, Paul and Barry return to his house in search of clues. They find his diary and try to recreate his movements, which takes them to some unusual places.

Paul and Barry set about tracking down the missing components to complete the professors machine.

Paul and Barry discover the final component is concealed on a medallion worn by the famous pop idol MCC Ugly. They follow him on his hectic schedual to retrieve it.

Maddy has the ruby, the three components and the professor.There is nothing to stop her completing the machine, but Paul has an idea to stop her.

Paul and Barry manage to track down the professor, who is being held captive by Maddy. The only problem now is how to get into Maddy's lair.

Paul and Barry celebrate saving the world then discover that they have been locked in and the door is guarded by a silver robot.

Paul thinks that they can flush out the original robber by pretending there's another jewel. Dan the Van agrees to help as long as they sell one of his antiques.

Now they have the duplicate ruby, Paul and Barry recall all the original guests back to Gran's house on the pretence of a magic show by the illusionist, Stomoli.

Paul and Barry find that Maddy is hiding out with the mysterious Shoo-ing monks. They go undercover to try to track her down.

Maddy has been captured. As Paul and Barry celebrate the weather starts to turn. Could it be due to the professor's machine?