London, 1941. The city is in blackout and an enemy is hiding in plain sight.

Jack Hoste has become entangled in a national treachery. His mission: to locate the most dangerous Nazi agent in the country.

He soon receives a promising lead in Amy Strallen, whose life is a world away from the machinations of Nazi sympathisers. But when Hoste pays a visit to Amy’s office, the dangerous game he is playing becomes even more lethal.