Ireland stars as the leader of a trio of swashbucklers (Tucker and Arlen being his cohorts) who find themselves stranded on a desert isle. One day a ship full of slave traders arrives in search of natives to kidnap and sell, so the trio of pirates steal their ship (including the captain
and first mate) and set sail for Australia. Once down under, the gang looks for ways to raise enough cash to set sail again in search of the loot that Ireland had buried years ago. Luckily, scientists Craig and Matheson, accompanied by the lovely De Carlo, want to hire a ship for a scientific
expedition. Ireland and his cronies jump at the chance, but once out to sea they realize th...