A medieval knight, aided by a present-day scientist, must navigate the ethical implications of time-travel as he sacrifices his chance to return home in order to prevent a great tragedy in medieval Europe, only to discover that his sacrifice has made him a revered figure in history.
Protagonist: A knight from medieval Europe who stumbles upon a time-traveling device; Deuteragonist: A scientist from the present day who assists the protagonist in understanding the technology and its implications.
The protagonist must confront the ethical dilemma of whether to use the time-traveling device for personal gain or to make sacrifices for the greater good, leading to a moral and internal struggle throughout the narrative.
In the end, the protagonist decides to use the time-traveling device to prevent a great tragedy in medieval Europe, sacrificing his own chance to return to his time. The deuteragonist, the scientist, helps him to make the necessary adjustments to the device, and the protagonist becomes a hero in both the past and the present.
Twist: The scientist, who initially helped the protagonist, turns out to be a descendant of the medieval people the protagonist saved, and the time-traveling device was created to ensure their survival. The scientist reveals that the protagonist's sacrifice was not in vain, as he is now a revered figure in their history.