In 2003, the world watched as coalition forces toppled Saddam Hussein’s regime, then scoured the country for the WMDs they knew were there.

Iraqi weapons of mass destruction were never found…but they exist.

On the eve of the invasion, five nuclear devices are smuggled out of Iraq and hidden in the most unlikely of places—neighboring Iran. Now, as the threat of WMDs fades into a late-night punch line, a hardline splinter group waits for the perfect moment to unleash nuclear terror.

When Navy SEAL Brendan McHugh captures a mysterious Iranian diplomat on a raid, it feels all wrong. While the official rules of engagement say he must release the diplomat, that doesn't stop McHugh from investigating further. With an FBI linguist and a CIA analyst on his team, he chases clues across the globe to arrive at a terrifying conclusion.

The threat to the United States heartland is bigger--and closer to home--than anyone dreamed possible.