A rebellious teenager and a mischievous inventor from an ancient civilization must race against time to reverse the unintended consequences of their time-travel experiments, only to discover that their actions have created a new timeline where time travel never existed.
Protagonist: A rebellious teenager who accidentally discovers the time-travel technology of the ancient civilization; Deuteragonist: A mischievous inventor from the ancient civilization who partners with the protagonist to explore the possibilities of time travel.
The protagonist and deuteragonist must race against time to find a way to reverse the unintended consequences of their time-travel experiments before it's too late.
In the end, the protagonist and deuteragonist successfully reverse the unintended consequences of their time-travel experiments, restoring the timeline to its original state. They realize the importance of responsibility and caution when tampering with such powerful technology, and decide to use their knowledge for the betterment of their own time.
Twist: As they reverse the unintended consequences, they discover that their actions have created a new timeline where the ancient civilization never discovered time travel. Now, they must find a way to restore the original timeline without causing further damage.