A scientist doing experiments on a human fetus discovers a method to accelerate the fetus into a mature adult in just a few days.

Lorelei Lee is a beautiful showgirl engaged to be married to the wealthy Gus Esmond, much to the disapproval of Gus’ rich father. When Lorelei goes on a cruise accompanied only by her best friend, Dorothy Shaw, Esmond Sr. hires a private detective, to follow her and report any questionable behavior that would disqualify her from the marriage.

In 1906 on a train racing through Siberia, mysterious and unearthly deaths start to occur while Professor Saxton is transporting the frozen remains of a primitive humanoid creature he found in Manchuria back to Europe.