A ruthless Roman emperor discovers a secluded Druid stronghold in the mountains of Caledonia, the last remnant of the mystical tribe. When the imperial legions threaten to annihilate the ancient civilization, a peaceful Celtic elder is forced to betray his vow of pacifism and to take up arms to defend his family from the inexorable advance of the Empire in a clash that will decide the fate of an entire culture.

Set against the high-stakes backdrop of the late Cold War, Adolf Tolkachev, an ordinary man who risks everything to pass thousands of pages of top-secret Soviet intelligence to the U.S. Despite repeated rejections by a wary CIA, Tolkachev persisted, embodying the courage to stand against a regime that betrayed its own people. Finally, finding an ally in CIA agent Tom Lenihan, Tolkachev was able to fundamentally shift the balance of power, proving that true patriotism lies not in blind allegiance but in the willingness to challenge a government when it strays from its ideals.