Dagmar Lassander

After a doctor kills his mistress and himself while researching the mysterious previous owner of his Boston home, his colleague, Dr. Norman Boyle, takes over his research and moves his family from New York City to the Boston mansion. Soon after, Boyle's young son Bob becomes plagued by visions of a young girl, who warns him of the danger within the house.

A middle-age businessman marries a much younger woman, but is still carrying on with his sexy secretary. He somehow still has the energy, however, to lust after his wife's visiting young niece...