Miss Mary-Kate Martin might be anxious, but she’s not scared of monsters. Dressed in sparkly red shoes and carrying her strawberry-scented notebook, Mary-Kate accompanies her archaeologist mother to the peaceful English countryside to investigate some interesting bones found in an old well. But once they arrive, they realise that the village of Woolington is not as peaceful as it seems.

There are mysterious noises, the earth is trembling, and the locals are worried about a terrifying old legend. Could there be any truth in the myth of the beast who lives in the ancient well? And if so, why would it return? With the help of a new friend, Mary-Kate starts getting to the bottom of this monstrous mystery.