1881—Special Agent Gillian Hamilton, magic caster for the Federal Bureau of Magic and Steam, has recovered from injuries obtained while in Shallow Grave, Arizona. Now back in New York City, Gillian makes an arrest on New Year's Eve that leads to information on a gangster, known only as Tick Tock, who's perfected utilizing elemental magic ammunition. This report complicates Gillian's holiday plans, specifically those with infamous outlaw, Gunner the Deadly, who promised they'd ring in 1882 together.

The two men stand on the cusp of a romance that needs to be explored intimately and privately. But when Gillian's residence is broken into by a magical mechanical man who tries to murder him on behalf of Tick Tock, he and Gunner must immediately investigate the city's ruthless street gangs before the illegal magic becomes a threat that cannot be contained.

This might be their most wild adventure yet, but criminal undergrounds can't compare to the dangers of the heart. Gillian must balance his career in law enforcement with his love for a vigilante, or lose both entirely.

The novel-length follow-up to The Engineer, in the exciting new steampunk series, Magic & Steam.