A modern-day archaeologist accidentally alters the course of history in ancient Egypt with a time-travel device, leading to catastrophic consequences in the present day, forcing them to make difficult decisions to set things right, ultimately sacrificing their chance to return to the present and embracing their predestined purpose in the past.
Protagonist: A modern-day archaeologist who accidentally discovers a time-travel device;
The protagonist's actions in ancient Egypt inadvertently alter the course of history, leading to catastrophic consequences in the present day, forcing them to make difficult decisions in order to set things right.
The protagonist sacrifices their own chance to return to the present in order to fix the damage they caused in ancient Egypt. They find a way to set history back on its original course, but in doing so, they become trapped in the past, resigned to living out their days in ancient Egypt. As they come to terms with their new reality, they find a sense of peace and purpose in being able to witness and contribute to the wonders of this ancient civilization.
Twist: The protagonist discovers that they were meant to be in ancient Egypt all along, and that their actions were actually part of a predestined plan to ensure the survival of the civilization. They realize that they have a greater purpose in the past, and willingly embrace their new life, finding fulfillment in shaping the course of history.