A curious teenager discovers a time-travel portal in a cave and must race against a time-traveling criminal to prevent a key historical event from being altered, only to realize that their actions have caused unforeseen consequences in the present.
Protagonist: A curious teenager who accidentally discovers the portal and wants to use it to change the course of history for the better; Antagonist: A time-traveling criminal who seeks to disrupt the timeline and create chaos.
The protagonist discovers that the antagonist is attempting to alter a key historical event and must race against time to stop them and preserve the timeline.
In the climactic showdown, the protagonist is able to outsmart the antagonist and prevent the historical event from being altered. The antagonist is apprehended and the portal is sealed, ensuring that the timeline remains intact. The protagonist returns to the present, knowing that they have helped safeguard the course of history.
Twist: The protagonist realizes that by stopping the antagonist, they inadvertently caused a different historical event to be altered, leading to unforeseen consequences in the present. The protagonist must now navigate the repercussions of their actions and find a way to set things right without using the portal again.