In the year 2423 a pacifist scientist attempts to halt the plans of the united Earth government from attacking the newly-discovered peaceful Martians. He tells the ruler that the blast of his magnetic force weapon is too powerful for Earth and must be tested on the moon. When the test is conducted there is no blast, and the ruler thinks that he's been tricked. The scientist reveals that the blast occurred on the dark side on the moon to shift it out of its orbit and send it crashing into Earth. The moon shatters into fragments, after playing havoc with the tides, and everyone on Earth is killed except for the scientist who feels that he did what he had to do in order to spare other beings Earth's tyranny.