In the year 2025, when humanity is in crisis, the protagonist is sent to ancient times to change history and affect the present. In the future, global robot wars will continue, seriously damaging the earth's environment and resources. Due to the visit of aliens, aliens require to live on the earth and share the right to live on the earth with humans. Otherwise, it will lead to war. Putting the battlefield on the earth, even if we can win the war, will bring unpredictable trauma to the planet we live on. To this end, use the newly developed space-time wormhole shuttle to send a person with the current top technology back to history to influence and change the future...
