When Kaye and her friend Clara hold a yard sale, they never dream a box of old post cards will send them on a search for a valuable artifact, a 'stone.' With the help of stone mason, Daniel, Kaye's family will try to solve the messages in the post cards and find an old house where the lost artifact must be hidden. When Katie's pet, Cow, gets lost in the woods, Kaye's family gets a sudden boost in the game of 'who finds the stone.' Their efforts are...