When a killer called "White Face" terrorizes the Tidal Basin slums, Scotland Yard's best detectives are on the case. But in a stunning twist, the evidence points to Dr. Marford, a devoted children's doctor. Is his clinic merely a cover for something more sinister? As the investigation unfolds, Detective Mason must navigate a dark underworld and confront secrets from the past. Suspicion even falls on a veteran cabby, the last person to be suspected of wrongdoing.

With its moody atmosphere and web of deceit, this classic crime novel takes readers on a gripping journey through 1930s London. The detectives are pushed to their limits to solve the mystery and unmask the murderer hiding in plain sight. Will they succeed before White Face claims more victims?