When CIA operative Avery Quinn is sent to a desolate joint U.S.-Russian base in the Arctic, she expects frigid diplomacy and outdated equipment-not the ghost of her past. But Mikhail Vetrov, a former KGB agent and the man who once broke her heart (and nearly broke her career), is not only alive-he's her counterpart.

What begins as a frosty standoff quickly thaws when they uncover a buried Soviet failsafe: Firewatch, a doomsday protocol capable of launching a global nuclear response based on fabricated threats. As trust fractures on both sides, Avery and Mikhail are forced into a fragile alliance to stop a phantom network from igniting World War III.

But the deeper they dig, the more they discover: Echo Base is only the beginning. Phase Two. Phase Three. The shadowy Syndicate is orchestrating a new kind of war-one waged through misinformation, psychological manipulation, and weaponized doubt.

From Arctic ice to European cathedrals, abandoned monasteries, and ghost installations in Greenland, Avery and Mikhail navigate a deadly game where loyalty is a liability, and love may be their greatest vulnerability.

In the end, survival won't be enough. To stop the network, they'll have to go dark, go rogue, and face the question neither dared to ask:

What if the Cold War never ended-just evolved?

Cold War: Warm Hearts is a slow-burn romantic espionage thriller about trust, betrayal, and the kind of love that only grows in the silence between heartbeats-and gunfire.