CIA spy Gabriel Pritchard engages in espionage against the KGB, particularly against Russian agent Tanya Morozova.

His work is compromised when he is embroiled in a conflict between two warring groups of sorcerers known as the Ice and the Flame, who have infiltrated the intelligence agencies of all major world superpowers.

Gabe and Tanya's loyalties to their countries and magical allies are tested as each group attempts to seize control of a Russian defector, who also happens to host a powerful elemental spirit.

The Ice and the Flame are groups of sorcerers seeking to control all 36 hosts, human beings who are possessed by elementals.

Gabe discovers that the Ice is freezing hosts in stasis, preventing them from being used by the Flame while simultaneously imprisoning them.

Gabe accidentally uses his new powers to awaken a golem, which begins terrorizing Prague and murdering police officers.

The CIA plans Operation Anchises, in which they will extract a Russian scientist and defector named Sokolov when he attends a scientific conference in Prague.

Aleksander "Sasha" Komyetski, head of the KGB office in Prague and Flame Acolyte, discovers an illicit radio in Tanya's apartment.

Dom kills Sokolov and escapes via parachute; the CIA and KGB both try to piece together an understanding of these events without knowledge of the sorcery behind them.

Gladstone and Smith served as show runners; they began by writing a "bible" for the series which mapped out the characters and plot lines.

[4] Writing for Locus, Liz Bourke praised the vividly-drawn characters and the consistency of the serial's tone despite multiple different authors.