11-year-old Colin is a cattle drover in the Scottish Highlands.

It is 1813, and he is allowed to go to the Falkirk Tryst for the very first time.

The long journey to Falkirk is packed with excitement and danger, but Colin's relief at arriving soon turns to horror when he realizes that their prize bull, Torcull the Black, has been stolen.

Can Colin find Torcull in time to sell him at the fair, and more importantly, can he rescue Torcull from the thieves without endangering his own life and that of his friend?