简介：AscientistworkingonanimportantnewinventionwhichwillprotectAlliedshippingfromU-boattorpedoeshasbeenassignedSecretServicesecurityprotection.Amazingly,despitethefactthathislaboratoryandexperimentsarelocatedontheupperfloorofhisWashingtonmansion,hedecidestohostacocktailpartyforfriendsonthefirstfloor.Eventhoughseveralofhisguestsareforeignnationalswithshadowypasts,herefusestoallowhisbodyguardstoattendbecausetheirpresencemightoffendthem.Whenheiskilledbyunknownmeansbeforejoiningthem,theresultantsummaryinvestigationincludesHonoluludetectiveCharlieChanandchildrenTommyandIris,laterjoinedbyBirminghamBrown,thechauffeurofoneoftheguests.Whenapreliminaryautopsyrevealsthescientistwaselectrocuted,Charlieandhisassociatesmustdecidewhichofthesuspectsandredherringsistheguiltyparty.…