LuluandJudyGeesoncontinuetheirearlierrolesandcometothefarewellparty.Thackerayannouncesthatheisleavingforaninner-cityschoolinChicagowherehewillteachagain.InChicago,hemeetsaformercolleaguewhoistheprincipaloftheschool.ThackeraylearnsthatthereisanAclasswithgoodstudentsandanH(for"horror")classfortheno-gooders.HeconvincestheprincipaltolethimtaketheHclassasaHistoryteacher.HisnewpupilsareHispanic,BlackandWhitekidswhoarenoisy,unrulyandengagedindestructivebehaviours.LikeinLondon,hestartsbyteachingthemsomemanners.HeaddressesthemasMrXorMissY,andexpectstobecalledMrThackerayorSir(hencethetitles).
　　Littlebylittlehelearnstheirpersonalstories:Wilsieisagangleaderwhoprotectshisyoungerbrother.Anotherisablackfemalewhobattlesagainstdoubleprejudice.Thewhitekidisgrowingwithoutparentsandhidesthistoavoidbeingfostered.
　　WealsoknowabitofMrThackeray'sstory.AsateenagerinGuyana,hefellinlovewithaChicagogirlwhosefatherhadcometobuildamall.TheylostcontactandhewenttoBritaintostudy,becameateacherandgotmarried.Heisnowawidowerbutdecidedtotakethisteachingopportunitytofindhisearlierlove.
　　Atschoolhesetsouttoteachthesetroubledkidsoftheirtruepotentialiftheytaketheirfateintheirhands.Heteachesaboutthenon-violentresistanceofthehistoricfightersofcivilrights.WhenhediscoversWilsiesmugglingagunintotheschool,heconfrontshimandconvinceshimtoyieldthegun.MrThackeraydeliversittotheschoolpolicemanasafoundobject.
　　Later,thepolicepressureshimtogivethenameofthearmedkid,sincethegunwasinvolvedinacopkilling.Herefusestogiveupthenameofthestudentandhastoleavetheschool.
　　Meanwhile,oneofhispupilshastakenajobinanewspaperanddecidestoinvestigateontheoldChicagoloveofThackeray's.Thegirlarrangesanappointmentforhim.Thackeraymeetsthesonofhisformerloveinahospital.Hismotherisill.Thackeraylearnsthatshelovedhimbackbutherfatherretainedallhisletters,becauseshehadgottenpregnant,sothatyoungmanhehadjustmetishisson.
　　ThackeraylearnsthatWilsieishiddenbecausehethinksthatthepoliceareafterhim.HisbrothertakesThackeraytothehideawaytoexplaintherealsituationandavoidthatWilsieruinshislife.Throughcourageandtalking,theteacherconvincesWilsietoyieldhisnewgunandconfrontsarivalgangthathadcometofightWilsie.Wilsieandthefriendwhohadgothimthegunexplainthemselvesattheprecinct.
　　Thekidshavebeendoinga"standin"andforcetheprincipaltoaccepttheirbelovedteacherback.
　　UnliketheBritishfilm,thereisnoinfatuationwithhimamonghispupils,butafellowteacher(SaundraSantiago)admireshim.
　　Thefilmendswiththegraduationceremonyanddance.MrThackerayannouncesthatheisnotgoingbacktoBritainbutstayingatChicagototeachthenewgeneration.
　　--Wikipedia