A cult of "caninus" or dog-worshippers is terrorizing a farm woman in order to get her to sell them her land, land that they need for a special ritual. The members of the cult keep their association secret and apparently have infiltrated all levels of local society, on up to Senator Bradford (John Carradine) who is the cult leader. Gory scenes are interspersed throughout the story as the cult murders anyone who starts catching on to the fact that they exist.