In 1921 a field expedition in Egypt discovers the mummy of ancient Egyptian prince Im-Ho-Tep, who was condemned and buried alive for sacrilege. Also found in the tomb is the Scroll of Thoth, which can bring the dead back to life. One night a young member of the expedition reads the Scroll out loud, and then goes insane, realizing that he has brought Im-Ho-Tep back to life. Ten years later, disguised as a modern Egyptian, the mummy attempts to reunite with his lost love, an ancient princess who has been reincarnated into a beautiful young woman.