"A brilliant scientist must outsmart a power-hungry dictator in a high-stakes battle across time and space, ultimately sacrificing their own existence to save a parallel universe from tyranny in this time-travel thriller."
Protagonist: A brilliant scientist who accidentally discovers the ability to time-travel; Antagonist: A power-hungry dictator from the parallel universe who wants to use the time-travel technology to change history in his favor.
The protagonist and antagonist engage in a high-stakes battle across time and space, leading to a final showdown where the fate of both universes hangs in the balance.
In the final showdown, the protagonist outsmarts the antagonist by using the time-travel technology to undo all the changes the dictator made in history. As a result, the parallel universe is saved from the dictator's tyranny, and the protagonist returns to their own universe, closing the door to time-travel forever.
Twist: The protagonist realizes that in order to undo the changes made by the antagonist, they have to sacrifice their own existence and erase their own timeline. In a selfless act, they make the ultimate sacrifice, ensuring that the parallel universe is saved, but at the cost of their own existence.