Two Russian ballet dancers (one a twin for Squiggy) try to defect to the U.S. The KGB mistakes Squig for the dancer and threaten his life. It's up to Laverne and a handsome male ballet dancer to rescue him and help the other two escape.

Impressed by Chuck's chops on the harmonica, Laverne advises him to start a band. He does so with his co-workers from the Aero-Space Factory. With Laverne's help, can these misfits of science become a '60s rock and roll "mod" squad?