In order for Hector to throw his annual winter party, he has to expand his hold to fit all his guests -- but a giant pebble is standing in the way. And he's "really" got to move it when his brother Cosmo -- and all of Cosmo's wumblepups -- move in for the winter! As if Hector didn't' already have a lot to do, he now has to look out for all his nieces and nephew -- and this is no easy task, especially when they are up against hungry ant lions with a taste for little red bugs.