n a pleasant day, the residents of Maple Street feel something akin to a tremor and hear a loud noise. Steve Brand thinks it's a meteorite though they didn't hear a create. When young Tommy tells them the science fiction story he read about an alien invasion where they were first sent among humans to live with them in disguise, paranoia sets in. They first suspect Les Goodman and loudmouth Charlie Farnsworth then points the finger at Steve and then Tommy. Events turn on Charlie as everyone runs amok.

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