Lâchez les chiennes (1973)

Carl, a handsome Austrian, tries to find a haunted treasure buried in a Norman castle by the Nazis before the liberation. He seduces a young vacationer who allows him to get to know the fickle lord and to seduce her in turn. Once in the square, his investigations are met with hostility from the crazy old manager, who jealously guards the loot with his two bitches trained to mercilessly hunt intruders. Gold will drive them all crazy, but love will save Carl.