Alan and Tricia Hamilton are blissfully happy. Until one day their perfect life is torn apart when Alan steps in front of a passing car, and he is left with a brain injury that completely transforms his personality.
Trapped in an isolated cottage, Captain Cavendish thinks he is seeing ghosts. The only person who might understand and help is Kate Lethbridge-Stewart ... but when she arrives, she realises that Cavendish is key in a plot to summon the Daemons back to the Earth. With time running out, Kate discovers that sometimes even the familiar can turn out to be your worst nightmare.
A hostage situation takes an unusual turn.
