on mars, a battle wages on between the race of mice, known as the martian freedom fighters, and the invading catatonian empire. both sides are fighting for the rights of one important machine: the regenerator. this machine has the ability to terraform mars, creating a safehaven for all mice. the catatonians wish to claim it so they can take over the planet. freedom fighter general stoker is the only one who knows how to build the regenerator. as a result, he is not present on the battlefield, but is instead on earth looking for molecules vital to the device's construction.