The Smurfs come to the rescue of two children and their grandfather when an evil mysterious stranger shows up and causes their sleigh to turn over, forcing them to seek help and inadvertently bring Gargamel in on the action.

Papa Smurf becomes a Smurfling, and the Smurfs must find a way to restore him to normal with the help of Gargamel.

Gargamel teams up with his godfather Lord Balthazar to capture six Smurfs for making gold by putting a spell on Mother Nature, freezing their forest. The Smurfs enlist the aid of the woodland animals to bring an end to their plans and to bring spring back into the forest.