In the doomsday wasteland where fuel is exhausted, a military bionic mechanical dog takes the young son left behind by the fallen soldiers on a desperate journey to find a human reserve. Its nuclear battery is its only lifeline - every run and every battle consumes non-renewable power. When raging mechanical beasts and hungry predators surround it, it must choose between the underlying code of "obeying humans" and the cruel instinct of "keeping the children alive." The flashing red light of the battery is the countdown bell of its life, and it is also the clarion call for it to burn out itself to pave the way for its children.
