George and her new friend Timmy the Dog are joined for the holidays by her cousins Julian, Dick and Anne. The Five set out to investigate a long-ago curse involving Kirrin Island, but it soon transpires they are not alone in their quest.

The theft of a priceless new code machine by enemy agents sends the Five on an eventful train journey up to Scotland.

The Five reunite at a hotel on Cragstone Ridge, where old foe Thomas Wentworth seeks their help. He has foreseen the murder of visiting jazz singer Cab Vee, and it is up to the Five to uncover just who is plotting to kill him.

In this adventure, the Five work together to discover the truth behind a mysterious plane crash. When a Spitfire crashes near Kirrin Cottage, the Five must work together to save the injured pilot and find out the truth of what happened to him, before his enemies strike again.

After a chance encounter with a circus magician, the Famous Five set off to find the mysterious Eye of the Sunrise and keep it from falling into the wrong hands.