Chandler is the commander of a US naval vessel who hoists up the skull and crossbones and sails the seas undercover in the hopes of capturing a gang of pirates. His rock-solid personality clashes with the flamboyant nature of Brady, the second in command, and eventually they reach the
point of a feud. Ball, a Portuguese countess, is also on board, attempting to get word to her countrymen that the pirates plan to overthrow the government. Ball and Brady are taken prisoner and tortured, but Chandler rescues them and destroys the pirates' malicious plot.