An expedition led by Professor Fuchs (Keir) locates the unmarked tomb of Tera (Leon) an evil Egyptian queen. A cabal of priests drugged her into a state of suspended animation and buried all of her evil relics with her. Fuchs is obsessed with Tera and takes her mummy and sarcophagus back to England, where he secretly recreates her tomb under his house. For days "before her birthday," his daughter Margaret (also Leon) - who bears an uncanny resemblance to Tera and was born at the instant they recited her name - has recurring nightmares. Fuchs gives her the old queen's ring and tells her to "wear it always." Of course, this only makes matters worse. Queen Tera's evil power begins to tempt Margaret, as she learns how she's feared by her father's former colleagues.