Bumbling thieves steal top secret Government formulas and hide them in a toy store chemistry set. An unsuspecting dad buys it before the thieves can recover it and gives it to his 13 year old son for his birthday. The boy experiments using the top[ secret vials and when the family dog licks the concoctions, one makes it TALK and the other makes it INVISIBLE! When the parents are away and the boy and dog are home alone, the thieves break in and get more than they bargained for.