Inventor Thomas Edison's boyhood is chronicled and shows him as a lad whose early inventions and scientific experiments usually end up causing disastrous results. As a result, the towns folk all think Tom is crazy, and creating a strained relationship between Tom and his father. Tom's only solace is his understanding mother who believes he's headed to do great things.

In flashback, fifty years after inventing the light bulb, an 82-year-old Edison tells his story starting at age twenty-two with his arrival in New York. He's on his way with the invention of an early form of the stock market ticker.