In the next electrifying installment in David Wellington's Jim Chapel Mission series, wounded Special Forces operative Jim Chapel must infiltrate a top-secret Russian military base and disable an unstable supercomputer if he hopes to prevent nuclear annihilation

A routine mission in Cuban waters to retrieve a hidden key code from a sunken Soviet submarine quickly changes course when Cuban officials are tipped off. It turns out that Nadia, the beautiful stranger who saves Chapel from being discovered, is actually a Russian agent, and her intel is shocking. Hidden during the Cold War, a forgotten Russian supercomputer controls hundreds of nuclear missiles, all aimed at the United States. Just one fail-safe error and America will be obliterated.

To disarm Hydra before it plunges the United States into nuclear winter, Nadia and Chapel must travel across Eastern Europe and infiltrate a secret base hidden deep in the steppes of Central Asia. But as these uneasy allies discover, not everyone wants the weapon out of commission.