In a post-apocalyptic world, a determined scientist and a resourceful scavenger must stop a future version of the scientist from altering the past with a time-travel device, in order to ensure the survival of humanity.
Protagonist: A determined scientist who has dedicated their life to developing time-travel technology; Deuteragonist: A resourceful scavenger who knows the post-apocalyptic world inside and out, and is willing to take risks to help the protagonist succeed.
The protagonist successfully builds a working time-travel device, but the Deuteragonist's reckless actions lead to the device falling into the wrong hands, endangering the future of humanity.
As the antagonist uses the time-travel device to alter the past, the protagonist and deuteragonist work together to stop them. Through their combined knowledge and determination, they manage to undo the damage and restore the timeline, ensuring the survival of humanity in the post-apocalyptic world.
Twist: The antagonist turns out to be a future version of the protagonist, driven mad by the post-apocalyptic world. The protagonist must confront their own future self and make a difficult choice to save humanity.