On a quiet night in their village, a stork visits the Smurfs and leaves a Baby Smurf on one of their doorsteps. But the next day, the stork returns-- the Baby Smurf was delivered by accident and must be returned! As soon as they go to fetch the baby for the stork, they find its gone! Where did the Baby Smurf go? And will the Smurfs really have to return it?