ThisstoryoftheBritishSilentServiceoperatingonthecoastofChinafindsTomFellows,captainofanopium-smugglingship,goingintoanotoriousChinesejointcalled"TheHouseofaThousandDelights,"wherehefindsabeautifulgirl,MaryBlake,boundandcaptive.Hestartsabrawl,rescuesMaryinthemêléethatfollows,andthenlosesherwhenshefleestoahotel.Hefollowsherandfindssheismixedupinsomemysteriousactivity.However,heknowsmoreaboutherthanshedoeshim(becauseheisn'twhatheissupposedtobe-andsheisn't,either),hestayscloseby,eventothepointofusingamachine-guntodispelamobataChinesetemple.