When a civil servant at the newly formed Ministry of Fine Arts is found crushed beneath a monstrous marble bust after dark, it appears to be the third instance in a string of fatal accidents at the department. Already disturbed by rumours of forgeries and irregularities in the Ministry's dealings, Minister Humphry David is soon faced with the possibility that among his colleagues is a murderer - though how the bust could have been made an instrument of death is a masterstroke of criminal devilment. Taking charge of the case, Inspector Julian Rivers of Scotland Yard enters a caustic world of fine art and civil service grievances to unveil a killer hiding in plain sight.