In the year 2977, humanity has long passed its peak; machines are able to perform any task a human can, and people have succumbed to apathy. However, there remains one who refuses to accept such an existence: Captan Harlock, a pirate who sails the sea of stars aboard his ship, the Arcadia. He is feared and loathed by most inhabitants of Earth, and yet he is their only hope against the Mazones, a strange alien race of beautiful women that threatens humanity. Thus begins a lonely battle in which Harlock and the crew of Arcadia struggle to stay true to their ideals, while slowly unravelling the sad tale of the Mazones.