After a prolonged conflict, Earth and the machine men finally achieve peace, a triumph that leans favorably towards the machines. Warrius Zero, who suffered the loss of his family to the machines, remains part of the unified Earth fleet alongside their former foes. Assigned a daunting mission to apprehend the notorious space pirate Captain Harlock, Zero grapples with this challenge. However, as he delves into his objective, unsettling revelations cast doubt on the true nature of the supposed harmony between Earth and the machine men.