Pint-sized swashbuckler Captain Sharky thinks he's the most dangerous pirate on the Seven Seas. To prove his bravery, he sets sail with Mikey, a well-behaved boy whose life Sharky has turned upside down, and Bonnie, a trouble-shooting girl who tends to assume command in every situation. This motley crew sails for big adventures as they thwart the plans of The Admiral and Old Bill the Pirate.