Complex sentence: The story leaves off were the first had ended, with The Time Traveler using his time machine to travel back into the future to save Weena, but when he gets to the future, he finds out it has changed.
Split into simpler sentences: The story leaves off were the first had ended, with The Time Traveler using his time machine to travel back into the future to save Weena. But when he gets to the future he finds out it has changed.