Pedro forms a new club with his friends dedicated to solving mysteries--and the first two assignments are finding his mother's locket, and his father's cell phone.

When Koko, Katie's new white puppy, is scared by a noisy truck and runs away, Katie and Pedro try to track her down in the snow, following several false leads until they finally see Koko.

When Katie's father loses his special rainbow ring while playing with the kids in the backyard, Katie and Pedro work to follow the clues to find the missing ring.