Maps follows a normal Earth boy named Gen. He and his girlfriend Hoshimi meet Lipmira, a woman from outer space, who tells Gen that he is the "mapman," meaning the map to a great treasure is coded in his genes.
The story of Maps centers around a typical Earth youth named Gen. Alongside his partner Hoshimi, Gen encounters Lipmira, an alien from beyond our world, who reveals to him that he is the "mapmaker," suggesting that the map leading to a valuable treasure is inscribed within his genetic code.