Screamers

The year is 2078, and on the planet Sirius 6B, a long, harsh, hate-filled war is being waged between the Alliance and the NEB's. However the NEB's are willing to begin peace talks, so Alliance leader Col. Joseph Hendricksson, accompanied by a man named Ace, and later a young boy, journey across the nuclear war-ravaged plains to meet with their foes. Upon their arrival, however, they discover that most of the NEB's have been annihilated by the "screamers," knife-brandishing robots that slice and slash humans simply for fun. Hendrickson and Ace soon realize that their lives are in grave danger, for it's impossible to know who to trust... for the blood-seeking screamers can take on any form, from an inanimate object -- to a young boy. (official distributor synopsis)