Clashing with their Grey Smurf alter-egos, who represent negative versions of themselves with decidedly bad habits, Papa Smurf considers building a wall to separate the opposing groups when the Gray Smurfs decide to go to war to conquer and enslave the real blue Smurfs. Simultaneous The Blue Smurfs meet the Grey Smurfs, negative versions of themselves with all of the Smurfs bad habits. Now someone is proposing they build a wall around the Smurfs' village! Will the Grey Smurfs have to pay for it?
