Old man Pettson and his kitten Findus are getting ready for Christmas. "What kind of Christmas is it without Santa Claus?" wonders Findus. "But Santa Claus doesn't exist, where would I find one?.." sighs Pettson. And then a brilliant idea hits him: he will build a talking Santa Claus himself. The kitten's dream came true, but Pettson did not expect his invention to work so perfectly. So what really happened?