Sheriff Holt is determined to prove that prisoners can be rehabilitated and released into society in this prison drama. In charge of a new kind of program, the sheriff places inmates in a clean environment and makes them build a road. Despite the improved conditions, the criminals continue to pull off a few shady shenanigans as an innocent man who is sent there soon discovers.

Dr. Paul Carruthers is frustrated because he thinks his employers, Mary Heath and Henry Morton, have cheated him out of the company's profits. He decides to get revenge by altering bats to grow twice their normal size and training them to attack when they smell a perfume of his own making. He mixes the perfume into a lotion, which he offers as a gift to Mary and Henry. When they turn up dead, a newspaper reporter decides to investigate.

A newsman helps a Brazilian singer get her brother out of trouble in New York.

A divorced glamour girl keeps warm with a professor amid sports and romance at Dartmouth College's Winter Carnival.

A bandit who robs both Americans and Mexicans is causing each side of the border to blame the other. Hoppy has to settle matters.