Justin Quayle is a low-level British diplomat who has always gone about his work very quietly, not causing any problems. But after his radical wife Tessa is killed he becomes determined to find out why, thrusting himself into the middle of a very dangerous conspiracy.
Two angels, Damiel and Cassiel, glide through the streets of Berlin, observing the bustling population, providing invisible rays of hope to the distressed but never interacting with them. When Damiel falls in love with lonely trapeze artist Marion, the angel longs to experience life in the physical world, and finds -- with some words of wisdom from actor Peter Falk -- that it might be possible for him to take human form.
An encounter with a blind man ends unexpectedly for Susan Howard. The supposedly helpless man stuns and kidnaps her. The case is handed over by the Home Secretary to Sir John, the head of Scotland Yard. He entrusts Chief Inspector Higgins and Superintendent Lane with the investigation. Their investigations quickly lead Higgins and Lane on the trail of murder, white slavery and blackmail.
