the story of a boy named Zeen Browngun exploring universe to save the earth where zeen Iron Browngun Is an intelligent 19 year kid with a AI fit inside his brain. who was born in alien invalid world. Where food and oxygen isn't necessary to live and without sun Earth mostly left with humans and potents who were the powerful aliens who attacked Earth to expand their empire. Let humans live on condition of eternal slavery of earthlings.  And hence in year 2345 nothing is left on earth  but somehow- Zeen Iron Browngun is now on a spaceship which nobody besides him alone with an Ai inside his head called AI-5.1 who claims to be his daughter who was preprogrammed to take him to somewhere safe where he can find a way to save earth as a mission on his head. The advantures life of father and his daughter to save the world begain  Where they were able to save the earth from potents or he dies miserable death.  Exploring space and universal tour of Zeen Iron Browngun begains....