With just one more good deed to do, Princess Pulverizer's Quest of Kindness is almost complete. But when she discovers that a fierce pirate named Cap'n Bobbie has captured a beautiful mermaid, she disobeys her father's strict rule not to go beyond the sea and stays onboard The Seasick Soaker, vowing to free the gentle creature--even if it means losing her chance to become a knight. Can Princess Pulverizer and her pals rescue the mermaid and escape the pirate's clutches, or are they doomed to walk the plank?