"Everything has gone to pot, basically," Paul said in an interview. "The world is sitting in another place and time, and he's kind of lost hope as to ever being anybody or achieving anything. Everybody keeps saying, 'You're the one. You're the guy. You're the ... .' But virtually everyone he knows has died, and the world has turned to s--t, and so he's kind of like, 'OK, I don't know what to do anymore with who I am or what I'm supposed to be here for.'"

Further complicating the situation, the love of MacLeod's life, Anna Teshemka (Thekla Reuten), has inexplicably left him. "And now his only intent is he just wants to find her," Paul said. "What ends up happening is that he finds her, but he finds her while she's on the quest with these other Immortals for the Source."

Paul said that The Source is different in structure from previous Highlander projects. "This was a more linear story," Paul said. "It had no flashbacks, which surprised me, actually, at first, because I always loved doing the flashbacks, and I know the fans loved them. So it was really tricky to do. I think the idea was really good, in the sense that ... it became a quest movie. All the others had a different feel to them and were a little more convoluted. This one has one storyline that goes all the way through."