Juggernaut: a massive unstoppable force, campaign, movement, or object that crushes whatever is in its path.

Kimball Hayden: Juggernaut.

In Virginia, a Blacksite facility is assaulted with military sophistication to free a homegrown terrorist who once attempted to assassinate FBI Specialist Shari Cohen. Within days, two of America’s most iconic symbols of freedom are razed. The stock markets begin to tumble, financial institutes are on the verge of declaring a "bank holiday", and the American psyche hasn’t been this fragile since 9/11.

In Rome, Kimball Hayden’s demons are at their worst, the man becoming a shell of his former self. But when he learns that Shari Cohen’s assassin is on the loose, he embarks on a trip of rediscovery that unites him with the woman he loves.

When it’s discovered that the assassin is plotting Operation Herod - a mission so terrible it could cripple the United States - the man behind the undertaking, Mohammad Allawi, has also set his sights on Shari Cohen with plans to finish what he started years ago, by seeing her dead.

For Mohammad Allawi to get to her, however, his highly trained unit must fight their way through the Vatican Knights most esteemed juggernaut known as Kimball Hayden.

As Kimball and Shari form a bond to hunt down her aggressor who keeps America on the brink, they also begin to discover each other. But as Allawi’s troops draw closer to Shari Cohen, the priest who is not a priest must once again work in the Dark to serve the Light, so that the woman he loves is protected at all costs, even if the cost is his own life.

In a battle with everything at stake - love, life, future - will Kimball Hayden finally find peace against such overwhelming odds? Or will this be his final mission as a Vatican Knight?