"I'm worried. . . .This damned black-out. I'm afraid of what may happen in the dark." Artists' model Althea Greville was, in life, known as something of a femme fatale. But the phrase becomes only too literal. What initially appears to be red paint leads instead to Althea's dead body, murdered in Morosini's renowned school of art. Hugh Collier of Scotland Yard is called in, but two more murder victims follow, one of them a female student...