George Barnard's life on the Dorset coast is turned upside down when she learns that her cousins are on their way from London to stay. George is smart, independent, and adventurous, and she just knows her relatives will spoil her fun.

When Uncle Quentin's life's work is stolen from Kirrin Cottage, the Famous Five take the night train to Scotland and are drawn into a deadly game of espionage, theft and deceit.

As the summer comes to an end, George sets in motion a final adventure to protect a circus magician from an unscrupulous doctor who wishes to make use of his powers in the clinic.

Five daring young explorers encounter treacherous, action-packed adventures, remarkable mysteries, unparalleled danger and astounding secrets that bring them closer together as friends.