If you could find criminals before they commit crimes...what would you do about it? A vigilante has appeared on the streets, taking justice into their own hands, and no one is safe. The police are baffled for one reason - the vigilante somehow anticipates where criminals will strike. Before they do. It's technology vs. toughness, as Inspector Locke has to out-think a blockchain-powered, social media-wielding opponent. Will he make it in time to save the next victim of this "Man with the Silver Cane"?