The evil knight Torchesac, who is at the service of the sinister lord of La Mortaille, gets a very powerful magic flute and uses it for evil purposes. Johan and Pirlouit, assisted by the magician Homnibus, travel to the land of the Smurfs, the only manufacturers of this sort of instrument, to get a new one and battle the usurpers.
William Coryn
as Johan (voice)
Michel Modo
as Pirlouit (voice)
Jacques Dynam
as La Mortaille (voice)
Henri Crémieux
as Homnibus (voice)
Michel Elias
as Le Grand Schtroumf (voice)
Ginette Garcin
as Dame Barde (voice)
Henri Labussière
as Fisherman (voice)
Georges Atlas
as Séneschal (voice)
Roger Crouzet
as Le Schtroumpf #2 (voice)
Jacques Ciron
as Le visiteur (voice)
Georges Pradez
as Le roi (voice)
