It's 30 years since Princess Smartypants made her bestselling debut in picture books - here she is in her first full-length adventure. Princess Smartypants rules her kingdom of Totaloonia on her own - she certainly doesn't need the help of a silly Prince of a husband. However, she is always willing to help her friends, and agrees to host the engagement party of three would-be princesses. But the trouble starts when the princes fail to turn up to the party - they've gone missing. Princess Smartypants is determined to uncover the plot and rescue the princes. With the help of Eric, her friendly giant handyman, she sets off on a wacky adventure to track the princes' last moves. Can Princess Smartypants solve the case of the missing princes and get them to the chuch on time before her next case waits? Hold on to your tiaras; there's a rescue mission to solve and a riotous wedding to plan!