In 1690, years have passed since Captain Blood was pardoned by the Crown for his daring deeds against the Spanish on the Spanish Main, and he is living quietly on his plantation in the West Indies, practicing medicine and planning his marriage to Isabella. But his peaceful existence is shattered when Hilary Evans arrives and arrests him on a piracy charge. Somebody has been raiding the islands, and making it appear it was Captain Blood. In order to prove his innocence, Captain Blood has to sail again under the "Jolly Roger."

A group of 21st-century colonists inhabit an underwater city called Pacifica. Originally intended as a purely scientific installation, the U. S. government wants to stash all its gold reserves from Fort Knox there, along with a fantastic new radioactive element. The brother of Pacifica's returning former commander plans to steal the gold and on top of that, the city faces destruction by an asteroid from outer space!

A group of refugees fleeing Chinese Communist rule via train are beset by a gang of terrifying outlaws.