Audrey and Arthur have escaped the horrors of Jupiter's lair and sought refuge in the countryside with their apparently mad friend Madam Akkikuyu.

But once again they are faced with terrifying evil as they become embroiled in a series of horrible murders.

As the story unfolds, it transpires that Madam Akkikuyu is not, in fact, mad ... she is haunted by the unquiet spirit of Jupiter, evil lord of the rats ...