It’s1945andHitlerisdead.TheremainingNazileadershipisexpectedtosurrenderanydaybutnotallNazisareinagreement.WhentheguardsofthecastleturnedPOWprison,CastleItter,fleetheirpost,agroupofFrenchpoliticalprisonersareforcedtodefendthemselves.RumorsofarogueNazicaptainhellbentonmaintainingtheThirdReichthreatenthelivesofalltheprisonersatCastleItter.WiththehelpofmembersoftheGermanresistance,asmallbandofAmericansoldiers,andoneShermantank,CastleIttermakesitsfinalstandinthefinalhourofWW2.