When the Hooligan Sisters break out of custody on Planet Land, one of them shatters a canister that unleashes monsters across the planet. The Galactic Penal Squad authorizes cybernetic peace officer Patricia Wagon to bring them back—equipping her with her signature Siren Helmet and Pellet Shooter. Along the way she receives support from General Gendarmor, a mechanical armor unit capable of extracting her from dire situations; Ugly Twitching Dog (U.T.D.), who creates reload points; and HQ, monitoring operations from a distance.