The Last Man on Earth begins in the future -- meaning sometime in the 1940s. Instead of World War II (which no one in 1924 could have foreseen), there is an epidemic of a strange disease, masculitis, which kills off every male over the age of 14. Every male, that is, except for one. Elmer (Earl Foxe) has had an argument with his sweetheart, Hattie (Derelys Perdue), so he jumps in a plane to go somewhere where there are no women. A few years later he is discovered by Gertie, a gangster (Grace Cunard). She brings him back to civilization where he finds nothing but women. The government buys him for ten million dollars and two female senators decide to fight for the right to have him as a husband (in 1924, no one would have thought to spread him around). He finds Hattie and rushes to her. The couple reconcile and get married.
by Janiss Garza synopsis