Samuel Johnson is in trouble. The demon Mrs Abernathy is seeking revenge on him for his part in foiling the invasion of Earth by the forces of Darkness. She wants revenge, and when a scientific experiment goes wrong, she gets her chance: Samuel and his faithful dachshund, Boswell, are pulled through a portal into Hell.

But catching Samuel is not going to be easy.

Mrs Abernathy has reckoned without the bravery and cleverness of one boy and his dog, or the loyalty of Samuel's friend, the hapless demon Nurd. Most of all, she hasn't planned on the intervention of an unexpected band of little men, for Samuel and Boswell are not the only inhabitants of Earth who have found themselves in Hell.

If you thought demons were frightening, just wait until you meet Mr Merry weather's Elves...