The planet Starlight is controlled by dragons. Because of the depletion in their atmosphere of an essential gas they must search for a way to survive. Being dragons, they are not skilled with ways to drill. One dragon finds humans on another planet, captures several, and forces them to drill through Starlight’s crust in order to release the gas. A man escapes and returns to the planet of humans. He tells everyone about the missing people they call the Lost Ones and how they went through a portal to a dragon planet. A few believe his story and form a group called the Underground Gateway, which refers to the portal. Unfortunately, the escapee’s son is imprisoned and becomes inaccessible, so the Gateway has to try to piece together information as they secretly search for the portal. After many unsuccessful years, they are considered by most to be nothing more than crackpot conspiracy theorists. One hundred years after the initial enslavement, a 24-year-old expert swordsman, sets out on a journey to find the portal to the dragon planet.