Kane Blueriver, a trouble contractor, is being hunted by a criminal syndicate named Nightmare because he pilots the Lost Ship Swordbreaker, the only hinderance to Nightmareâs plan to spread the dark lord Dark Star throughout the galaxy. Kane, along with Millie, a girl who dreams to be the âbest in the universe,â and Canal, Swordbreakerâs AI, vows to defeat Nightmare, who, besides having a sinister plan, killed Kaneâs grandmother many years ago.