Thirty years ago, evil Immortal Quenten Barnes was executed in the electric chair, and promised he'd be back. Escaping the tomb that he has been captive to for the last several decades, Barnes begins hunting down the people involved in his execution. Joe Dawson learns that he has returned and tries to get MacLeod involved in Barnes' apprehension. Mac declines to get involved unless Barnes gets in his way, but when his old friend Michael Moore comes to town, a flashback shows us that Barnes killed Michael's wife and has a long-standing grudge against Michael. Now Mac is involved. He convinces Dawson to share the Watchers' surveillance file on Barnes with him. However, the file isn't much help. As the prosecutor and priest who were at Barnes' execution are killed off one by one, it becomes clear that Barnes will come after Michael next. The story ends with an interesting twist as MacLeod must make a decision that will affect the ""lives"" of two different personalities.

Trente ans plus tôt, l'immortel Quentin Barnes, est exécuté sur la chaise électrique, mais il doit revenir sur terre. Dawson informe MacLeod qu'il est de retour pour tuer tous ceux qui ont participé à son exécution. MacLeod ne se sent pas concerné jusqu'à ce qu'il apprenne que la femme d'un ami a été assassinée par ce même Barnes.

Der permanente und gnadenlose Kampf gegen das übermächtige Böse trifft Duncan MacLeod besonders hart; er verliert seinen besten Freund und muss sich obendrein einem unfairen und hinterhältigen Duell auf Leben und Tod stellen. Seiner Lebensgefährtin Tessa wird nach dem Leben getrachtet. Kann MacLeod den tödlichen Zweikampf gewinnen und seine geliebte Tessa retten?

Barnes, un immortale condannato a morte, torna dopo trent'anni con l'intenzione di vendicarsi delle persone coinvolte nella sua esecuzione. Joe Dawson cerca di rendere MacLeod partecipe della cattura di Barnes. Inizialmente MacLeod rifiuta, ma cambia idea quando scopre che Barnes ha ucciso la moglie del suo amico Michael Moore.