In the sewers of Deptford, there lurks a dark presence which fills the tunnels with fear: Jupiter, an evil being who aims to take over the world.

Worshipped by the fearsome rats, Jupiter's dreams could well come true.

Can the mice ever survive against such evil? Or have they lost the comfortable world they once knew for ever ...

This stunning trilogy commences with "The Dark Portal", in which Albert Mouse squeezes through the Grill and disappears.

Realising that he has been captured by the rats of the sewers, Albert's children, Audrey and Arthur, embark on a treacherous journey to find him.