The world is falling into chaos. As he roams a crumbling city, Duncan MacLeod (Adrian Paul), the Highlander, remembers happier times before the love of his life left... Hopeless and alone, MacLeod finds his way to a band of immortal companions, including his mysterious friend Methos, and a mortal, Watcher Joe Dawson. Together this small group sets out on a quest to find the origin of the first Immortal and The Source of their immortality.

This new adventure is the first feature in the Trilogy. "The Source" tells the story of Immortals as they quest to locate the Holy Grail of their world. The entire series of films will chronicle the origins of the Immortals.