Trouble is heading for Wickit Monastery through the sweltering summer Fens - from the King's court comes Cedric with a chip on his shoulder, and from the land of the Vikings, Rane, a beautiful Norse girl, arrives with her hulking henchmen.

But what are they really here for? Pip the orphan and Perfect the stone gargoyle find themselves caught up in a mad search for buried treasure, which leads them right across the marshes, all the way to the dreaded Black Bog, the very last place they want to be. And all the while, they can't shake the feeling they're being watched...