It's just a little key. Somebody sent it on the mail. But the person it was sent to never got it- and nobody knows who sent it. So now it's in the Dead Letter Office at the city post office. When Elise hears about it, she decides to solve the "BIG mystery of the LITTLE key." Elise and her friend Danny search for answers all over town. Who sent the key? Who was it for? And, most importantly, what does it open?
9 parts