From the introduction:
So, Papa is dead. He was killed by the evil Gargamel in a final battle over the virginal Smurfette. Now, years later, Papa Smurf and Gargamel are horrible undead Smurfs of mighty power and disgusting appearance. Smurfette was also killed in the struggle and haunts the forest as a ghost.
In the village, Smurfs have taken to fighting and squabbling over power. They raided the magical stockpiles of both wizards and now no Smurf is safe. Half-trained Smurf magicians run around creating new girl Smurfs for their wicked pleasures. Disgusted brainless Smurfs are running their own villages with old swords from Gargamel’s tower, smurfing the smurf out of their friends and enemies who dare to smurf with them. It is mass chaos.
But some pockets of smurfly intelligence remain. You and your brave Smurf comrades remain in the original village, trying to lead a smurfy life.
Now, what the smurf are you supposed to do?