Timekeeper
In 2145, Earth teetered on collapse. Dr. Aria Chen, a geneticist, worked in a secret lab developing time-travel technology. Her breakthrough sent her back to 2045. Surrounded by fresh air and familiar faces, Aria realized she could alter the future's fate. Steadying her resolve, she placed the vial of enzyme in a bush, then stepped back through the portal. As she returned to 2145, a decision weighed heavy: use time travel for good or abandon it forever.