The good guys keep on with their quest to find the mystical location of 'The Source', and are tracked by The Guardian who slowly finishes them off one at a time.
After what seems like an eternity, Duncan MacLeod, the blonde monk, Methos and Anna jump into a 4x4 to drive through (I think) the English countryside, until they take a turning through a forest - and rather than take a different route stop in front of a dude hung on a tree. They get out to investigate ... and of course it's a trap.
They are captured by a gang of outlaws and brought back to their camp. In an Austin Powers style moment, the bad guys gather around the campfire and turn their backs while the good guys are strung up against some trees ... giving them the opportunity to get away one at a time.
Finally, the leader of the troop notices their captives (and main course??) have escaped. They jump onto motorbikes to give chase. Anna is away and first to find the location of 'The Source'. Methos and Duncan stick together, while the monk is surrounded.
Duncan chooses to go back to rescue him. Methos finally realises that his friend is the better man -- and that Duncan should be the one to challenge The Guardian, so he leads off the bad guys in a different direction. Meanwhile after all that, The Guardian makes quick work of the monk and takes off his head.
The planets have aligned in a surprisingly quick fashion in the last five minutes. Anna is in a trance watching them in a blue haze, while Duncan must finally face off against The Guardian.
The Guardian does all his 'fast forward' tricks ... but wait, Duncan pulls out a set of knives and, somehow which makes no sense, is even quicker than the mystical being. The fight and slice, and Duncan finishes him off Roadrunner style by spinning his enemy around so fast that he burrows down into the ground and can't move. He refuses to finish him off.
This drives The Guardian mad, who screams and explodes into a ball of blue light. I know, this movie really is this bad.
Not sure if that makes him The Guardian now, or keeper of 'The Source' or whatever this movie has planned, but Duncan now climbs up a few steps to see Anna surrounded by 'The Source' (basically a blue spotlight). They hold each other, disappearing into the stars, as Anna tells him that she is pregnant (probably too early to tell yet, but hey what would I know). Duncan is pleased - and claims that 'He is The One'.
...Until the results of the DNA test are in and he gets a nasty surprise.