"Earth—homeland of humanity, cradle of all life." Such words are now buried deep in the forgotten annals of history. In an age where the vast cosmos stretches endlessly, Shinnosuke Kashimura serves as a patrol squad commander in the fleet of a galactic nation. Though diligent and competent, he remains a career captain—passed over for promotion time and again. One day, a twist of fate leads him to leave the military and choose the life of a humble spacefaring adventurer. Thus begins the tale of a proud man, soaring freely through the stars— A spacefaring drama of solitude, honor, and freedom in the infinite reaches of the galaxy.