Xavier St. Cloud returns, killing Immortals with the help of mortal mercenaries who shoot his prey, making his kill easy. His next target is MacLeod but, warned by Dawson, Mac and Charlie just manage to escape death -- though the dojo is all but destroyed in the gunfight. Renee Delaney, a CID agent investigating the mercenary angle, gets on the case. MacLeod goes after Xavier himself, and Charlie insists on coming along. During his battle with St. Cloud, MacLeod spots James Horton, the Hunter who killed Darius. Distracted, Mac is 'killed' and falls down an elevator shaft out of beheading range, and Charlie is badly wounded and lies near death. Blaming Dawson for helping Horton escape alive, MacLeod warns him not to cross his path again.

Dawson has a new girlfriend, art historian Lauren Gale, and a new attitude on life. Unfortunately, Dawson arrives at Lauren's house one evening to witness her murder. We discover the murderer is Armand Thorne, benefactor of the Thorne Museum of Antiquities, who was being investigated by Lauren. MacLeod finds an ancient gold cross on display in Thorne's museum, a cross that had been stolen out from under his protection nearly two hundred years before. Armand Thorne, MacLeod discovers, is actually John Durgan, the Immortal trapper who murdered a frontier priest and stole the cross. MacLeod persuades Amanda to come out of cat-burglar retirement and help him to steal the cross from the museum in order to lure Thorne out of his heavily protected fortress. MacLeod confronts Thorne, taking his head, and finally gets fulfill his promise to return the Cross of St. Antoine.