It's been three months since Amber's last mystery, and she's dying inside. Amber Greene has solved so many cases in her young life, and she really doesn't know how much longer she can take without figuring something out. It's driving her absolutely crazy! In till one day, a big mystery comes up called, "The Case of the Missing Girl." She lies down on the soft grass, thinking of how older brother could be tied up with this story. Soon, little pictures show up the blue sky. It's up to her and her best friend, Adam, to figure out this mystery. Using the clouds.