A mystery is afoot. Where have all the lost socks gone? Brother can't understand why he has so many mismatched socks. No matter where he looks, he can't find two that are the same. And now he's sure his favorite stripy footwear must be getting gobbled up by a hungry sock-monster Brother teams up with Sister to check inside the hamper and under the bed. But there are no missing spotted stockings to be seen. But wait, there's their...