Esra Grumpwolf is banished from the Haddon Pack because he is not quite invisible. Afraid and utterly dejected, he makes his way to the Timewell Woods, a weird part of the Moor which conceals the TimeWell. But the grumpy Wolf is a superb hunter and can even use the bizarre effects of the TimeWell itself to track down the nests of his favourite prey, the deceiving one-eyed Mag-Birds. One moonlit night he closes in for another Mag-Bird kill only to find that there is a small lost girl sleeping in the nest. But Esra is also being hunted - by an evil Beast that stalks the Moor