The residents of a small town are excited when a flaming meteor lands in the hills, until they discover it is the first of many transport devices from Mars bringing an army of invaders invincible to any man-made weapon, even the atomic bomb.
Young Bart Collins lives with his widowed mother Heloise. The major blight on Bart's existence is the hated piano lessons he is forced to endure under the tutelage of the autocratic Dr. Terwilliker. Bart feels that his mother has fallen under Terwilliker's sinister influence, and gripes to visiting plumber August Zabladowski, without much result. While grimly hammering away at his lessons, Bart dozes off and enters a fantastical musical dream.