Complex sentence: When Melan is taken back to brigadoon by the renegade Marin comes to brigadoon to save him but he doesn't remember her and tries to kill her and ends up injuring her very badly.
Split into simpler sentences: When Melan is taken back to Brigadoon by the renegade, Marin comes to Brigadoon to save him. However, he doesn't remember her and tries to kill her; he ends up injuring her very badly.