简介：一位英国政府的副部长发现恐怖分子试图引爆伦敦的一座核设施 AjuniorministerintheBritishGovernmentdiscoversaterroristplottodetonateanucleardeviceinLondon.Puttingself-preservationfirst,hefleeswithayoungAmericanpoliticaladvisortoare-commissionedSecretNuclearUndergroundBunker-S.N.U.B.Theyfindthemselvesentombedinthebunkerwithadisparategroupofindividualscaughtinthewrongplaceatthewrongtime.Theterroristbombisfound,butattemptsbybombdisposalexpertsfailtopreventitexploding,destroyingcentralLondonandcontaminatingthesurroundingcountryside.Asaresultoftheblastagroupofdangerousconvictsbreakoutfromalocalhighsecurityprison,butarecontaminatedwithradiationandstarttomutate.Themutantsinfiltratethebunkerandonebyonetheoccupantsendureahorrible,grislydeath.Eventuallyoneofthesurvivorsescapesfromthebunkertomakecontactwiththeoutsideworldandarescuehelicopterisorganised.ButinsidetheS.N.U.B.themutantsareclosingin.Noteveryonewillmakeit...…