Dude finds chick. Dude helps chick when "bad men" come after chick. Dude and chick get sent back to the future. Chick gives dude necklace. Dude drops necklace. Dude gets captured. "Bad men" are looking for the necklace. Dude gets tortured and meets new chick. New chick gets raped. New chick kills raper and escapes. Dude is forced to join "bad men." Dude becomes friends with some of "bad man's" men. Dude is forced to kill people. Dude runs away. Dude meets up with new chick. New chick wants to kill all of "bad man's" people, dude just wants to stop "bad man." Dude kills "bad man," everyone lives happily every after.
That about sums it up, right? Am I missing anything (it's been years since I saw the series)