A historian from the future must outsmart a ruthless criminal in present-day New York City to alter the course of history, but when they return to the future, they realize their actions have led to a dystopian reality, forcing them to fix the damage and restore the original timeline.
Protagonist: A historian from the future who accidentally gets stuck in present-day New York City; Antagonist: A ruthless criminal from the future who will stop at nothing to prevent the protagonist from altering the course of history.
The protagonist discovers a hidden time-travel device in the future, leading to a dangerous chase through the streets of New York City as the antagonist tries to stop them from changing the course of history.
In the climax, the protagonist outsmarts the antagonist and successfully activates the time-travel device, returning to the future and altering the course of history. The antagonist is left stranded in present-day New York City, unable to stop the changes the protagonist has made. The protagonist returns to a new and improved future, knowing they have made a positive impact on history.
Twist: As the protagonist returns to the future, they realize that the changes they made have unintended consequences, leading to a dystopian future. Now, they must find a way to fix the damage they've caused and restore the original timeline.