Documentary about the city of Berga and the representation of "La Patum", a tradition that comes from the 14th century. Pictures of the town and the day of Corpus Christi: the streets and the small squares absolutelly full, big heads, giants and "la patum" in front. The jumping of the horses and the leap of the clubs, angels and demons, the big bullfight and the black bullfighter, the old dwarves, the eagle, the giants and dwarves, the new dwarves, the devil's jump, the jump of the crowds, castles of fireworks and final apotheosis.