Horror in which a couple find themselves stranded in a small European village, where they pique the interest of a local aristocrat. When the honeymoon of Gerald Harcourt (Edward De Souza) and his new wife, Marianne (Jennifer Daniel), is interrupted by a car breakdown, they reconcile themselves to staying a couple of days in a remote village. The locals seem friendly enough and the wealthy Dr. Ravna (Noel Willman) even invites the couple for dinner at his chateau. However, once trapped in Ravna's house the newlyweds swiftly find themselves regretting the invitation as they become the subject of increasingly bizarre and threatening behaviour...

In this sequel to 'Evil of Frankenstein' (1964), the Baron (Peter Cushing) has taken up residence with well-meaning inebriate Doctor Hertz (Thorley Walters). When Hertz successfully revives Frankenstein after freezing his body, the latter deduces that the human spirit does not leave the body after death, and can therefore be transmuted into another form. He gets the chance to prove his theory when his young assistant, Hans, is hanged for a murder he did not commit, and Hans' disfigured lover, Christina, commits suicide in despair. After performing cosmetic surgery on Christina, the two scientists successfully transfer Hans' spirit into her body. However, Hans now sets out to take revenge on those responsible for his death.