Absorbed in his search for food, a shy hermit crab, disguised in a fancy new shell, inadvertently rescues a flounder caught beneath a trap and wins the admiration of the other marine animals.
As a family lives out the famous poem by Clement Moore, a young mouse who shares their house is unable to sleep and, in his excitement, performs several deeds bound to place him on the naughty list, and one that just might save him.