Iron Hearts (фемслэш)

Set during the waning years of the Cold War.
Elsa Morgan Conway is a British MI6 agent tasked with tracking down a secret organization that threatens to topple the world balance. Anna Drozdova-Shevchenko is a Russian KGB operative who will finish her mission at any cost. Two opposing factions, two warring ideologies, and two spies with iron hearts pitted against each other in a bitter rivalry.
A story of espionage, deceit, suspense, and an impossible romance.