Dr. James Mydell is involved in an unfortunate incident of assisted reproduction. For one has to deal with extracting semen of a Bronze Age men recently found in a glacier. On the other, he have to help a couple of friends, the Cordell, solve their fertility problems. But carelessness causes an unexpected samples were confused and finally Elaine Cordell is inseminated with semen of prehistoric man.
Dashing legionnaire Rick O'Connell and Beni, his weasel of a companion, stumble upon the hidden ruins of Hamunaptra while in the midst of a battle in 1923, 3,000 years after Imhotep has suffered a fate worse than death; his body will remain undead for all eternity as a punishment for a forbidden love.
A giant metal machine falls to Earth and frightens the residents of a small town in Maine in 1958, until it befriends a nine-year-old boy named Hogarth and ultimately finds its humanity by unselfishly saving people from their own fears and prejudices.