A trio of sophisticated criminals strap a bomb to Sheriff Lobo's chest and order him to rob the Orly Bank. An attempt to trick the criminals backfires when they decide to take the bomb off Lobo and strap it onto Perkins. One false move and Orly will be a smoking crater.

A series of unsolved armed robberies follows the circuit of the Miami Marauders women's roller derby team. Perkins, Birdie and Margaret Ellen go undercover to infiltrate the team and reveal and rout the robber, but to win the roller derby they will have to recruit out of retirement Orly County's rollerskating champion of 20 years ago.