"Don't call this mermaid "little"—call her "captain," unless you want to walk the plank. Mary is in love with the so-called prince of Charles Town, except he doesn't love her back. Which is inconvenient. Since she's a mermaid, being brokenhearted means she'll—poof!—turn into sea-foam. But instead, Mary finds herself pulled out of the sea and up onto a pirate ship. To survive, she joins them. But Mary isn't willing to just sing the yo-ho-hos....