When the body of a man is found crucified at the top of a hill in the British midlands, AIDE Lock--the world's first AI Detective--and Detective Kat Frank are thrust into the spotlight as they are given their...

When the body of a man is found crucified at the top of a hill in the British midlands, AIDE Lock--the world's first AI Detective--and Detective Kat Frank are thrust into the spotlight as they are given their first live case. When a second body is found the police issue an extraordinary warning to local males aged between 30 and 40 years old:

- Avoid drinking in pubs
- If you must go to a pub, do not leave alone
- And definitely do not leave a pub with a stranger

With the national media and local men in an uproar, Kat and Lock have to combine their instincts and algorithms to catch the killer before they can strike again.