After their mother dies, David and Penny move to her family’s old house in the forest. Dad says it’s a fresh start but it feels sad and empty without Mum.

And there are noises in the attic …

A small furry creature is living in the roof. There are other creatures too - less friendly ones - that seem to be multiplying. Only with Pog’s help can David and Penny save themselves - and goodness in the world.

If they can resist promises from the darkness …