Baron Greenback uses a shrink ray to enter Colonel K's body to learn all of the Colonel's secrets. Danger Mouse and Penfold follow, but they get diverted after Greenback changed some of the signs.

Danger Mouse and Penfold find Baron Greenback's hideout, but the Baron has escaped, and Stiletto is left behind in disguise. Stiletto gets hit by something that turns him completely white, and ...