"Detective Nick Harris, Chief of the internationally known Los Angeles Detective Agency bearing his name, in one of his dramatizations of true life crime stories - proving to the youth of today, the folly of committing crime..."

The story that Nick relates today happened in the city several years ago, and while it was a baffling case, the criminal left one very important clue, which led to the solution of the crime which had shocked the whole city. The story opens on the evening of fourth July, when suddenly there is a terrible explosion at the front of a house...