Strange and curious things were happening in the Wallaby household. Young Wilson Wallaby was good at counting; he practiced every day. But... Jars of jam, rocks and socks were going missing! Perhaps there was a thief? Was someone robbing the Wallaby's? How will young Wilson Wallaby catch the thief? A nocturnal plan is put into place. The unexpected answer is a surprise to everyone. Grandpa Wilson Wallaby relates a mysterious and puzzling tale to his grandchildren, William and Wendy. It happened when Wilson was a young wallaby; just as they are now. Enriching friendships between young and inquisitive and worldly and elderly unfold in this tale of a tale.