They spend time repairing and improving Stig's den, collecting firewood, going hunting, and at one point catching some burglars who break into Barney's grandparents' house.

During a very hot, sultry mid-summer's night, when Barney and his sister Lou are unable to sleep, they find themselves transported back in time and out onto the Downs.

They spend a night camping out with the people of Stig's tribe, and helping to shift the final stone into position before sunrise.

Barney and Lou do not share their adventures with anyone, and their parents never realise the truth of Stig's existence, although they jokingly talk about him as a kind of magical being that can fix particularly "odd jobs".

[5] Topologika Software Ltd has published an adventure game for Microsoft Windows based on the first three chapters of the book.