Larceny Lu and her gang ran a stolen auto parts ring which was uncovered by Junior Tracy. The gang escaped when Dick Tracy raided their hideout, but Junior and Tracy captured them during their escape in Crossville. Lu soon slipped out of jail, teaming up with her accomplice Mortimer and Steve the Tramp. Lu was able to capture her old enemy "Scotty" Bumpsted and gave him to Doc Hump for experimentation. Doc was arrested and Lu again captured Scotty, this time paralyzing him. Scotty’s mother Edith hunted Steve and Lu down, almost killing them.