Untiltheendofthenineties,theHongKongcinemathatexploredthelimitsofsexandviolencewithoutshamewaslabeled"categoryIII".CalumWaddell'snewdocumentary,anexhaustiveinvestigatorofthemysteriesofgenrefilm,isimmersed,throughinterviewsandarchivalimages,inoneofthemostwildandexcitingpopularfilmcycles.