When his friend Charles Pitt-Heron vanishes mysteriously, Sir Edward Leithen is at first only mildly concerned.
As he gets deeper involved with the underworld, Leithen finds himself facing the enemy alone and in terrible danger..
The authorities are unable to act without evidence.
Their codename is \'The Power-House\'.
But a series of strange events that follow Pitt-Heron\'s disappearance convinces Leithen that he is dealing with a sinister secret society.
When his friend Charles Pitt-Heron vanishes mysteriously, Sir Edward Leithen is at first only mildly concerned