Lucy can't find her princess crown anywhere, and she's quite upset. Her older sister, Eva, agrees to help her find it.

The girls check out every lead they can think of to try and find the missing crown. As they work through their investigation, Lucy and Eva play dress-up; meet up with their soccer-playing friend, Alejandro; discuss the case with Mom and Dad; play with their silly dog, Prince; and spend some time in their tent.

Will the girls find out what happened to the crown? With these young Princess Investigators employing teamwork and an inquisitive spirit, they've got as great a chance as anyone.