The daughter of wealthy businessman is taken hostage by a gang of radical black revolutionaries. While she fears for her life at first, she gradually starts to become sympathetic to her kidnappers' cause, and begins to consider herself to be one of them.
During World War I, a German U-boat sinks a British ship and takes the survivors on board. After it takes a wrong turn, the submarine takes them to the unknown land of Caprona, where they find dinosaurs and neanderthals.
On Saint Valentine's Day in 1900, the female students at a private Australian school are given permission by their stern headmistress to travel to an ancient volcanic outcropping for an afternoon picnic.
A newly arrived governor finds his province under the control of the corrupt Colonel Huerta. To avoid assassination by Huerta, he pretends to be weak and indecisive so Huerta will believe he poses no threat.