The peaceful farming planet Akir faces annihilation from the malevolent overlord Sador and his fleet. Desperate and outgunned, the Akira people send young Shad on a mission to recruit mercenaries to defend their home. Shad, piloting a sentient spaceship named Nell, ventures into space and gathers a diverse team of fighters. Among them are a skilled assassin, a space cowboy, and a rebellious Valkyrie warrior. Each is drawn to the cause for personal reasons, despite initial reluctance.

As Sador's impending attack looms closer, Shad and his eclectic crew of mercenaries prepare for a fierce battle they may not survive. They strategize and augment their defenses, developing deep bonds of camaraderie and respect. The ragtag group must overcome their differences and combine their unique skills to devise a plan strong enough to confront Sador's technologically superior forces. With bravery and determination, they face the possibility of ultimate sacrifice to protect the innocent and uphold the values of freedom and justice.