In 1847, after a confrontation with British soldiers, Jamie Galway awakens from a coma to find his brother, Ryan, and the ancient Irish text they had sworn to protect are missing. Jamie learns that his brother has been forced onto a ship bound for Canada. The ancient script, one of the keys to the secret location of a priceless treasure, has gone with him. On the advice of a secretive band of priests called the Brotherhood, Jamie crosses the Atlantic to find his brother and the lost key.
Unaware that Jonathon Wilkes, a ruthless treasure hunter is also on the trail, Jamie must find Ryan first, before Wilkes, in his desperation to find the elusive treasure, resorts to murder. Jamie, followed by Wilkes, must race across an ocean and throughout Canada to see who will be the one to claim the Emerald Key.