As Devon, Gary, and Nathan struggle to combat increasingly dangerous enemy attacks, they must also handle changes in their personal lives. As women make their way into their hearts, Devon and Gary must find a way to strike a balance between their double lives-between the seen and the unseen. The more Devon and Gary struggle to maintain their public and private facades, the more their relationships become strained.

When a group of Irish terrorists get their hands on a nuclear weapon, the men's lives are thrown into turmoil. Their personal and professional lives explode into chaos. Now, Devon, Gary, and Nathan must set aside their differences and work together to prevent disaster, especially now that the life of one of their own is hanging in the balance.