One day as Wembley and Boober are going down by Roaring Rivene, they come upon a huge collection of colorful smoothies and rollies, the greatest gift you can give to a Fraggle. But then, something even more amazing happens; Wembley spots the Perfect Blue Rollie, the rarest pebble in the universe. He gives it to Boober in the spirit of giving. But Boober becomes selfish with the rollie and puts it in his Hidey Hole, a cave where Boober keeps all of his stuff. When Gobo, Red and Mokey see it, they do their best to get Boober to bring it to the Great Hall and have a party. Boober becomes even more selfish, kicks his friends out, and spends his time protecting the rollie from being stolen. But when Wembley unsuccessfully sneaks in as a ball of laundry lint to steal it back, a cave-in occurs, leaving Boober inside. It's up to his friends to save him before Boober becomes trapped forever, with all his 'stuff.' (thetvdb.com)