In Parsifal, Wagner recounts one of the central stories of the Holy Grail. The Knights of Montsalvat have been entrusted with the Grail, the vessel from which Jesus drank at the last supper, and with the Sacred Spear, with which a Roman soldier wounded Christ on the Cross. The Spear has been lost to a magician, Klingsor, and the ceremony of the Grail has been disrupted ever since. Because he is pure and innocent, Parsifal is destined to recover the Spear, bring it back to the Knights and heal the ailing king, Amfortas.

Three excerpts from the opera will be performed in continuity: the transformation of the forest of Montsalvat into the Hall of the Grail; the Eucharistic celebration of the Grail; and the return of Parsifal with the Speer. (The first two excerpts are at the end of the first act, the third is at the very end of the opera, in the third act.)

In the first excerpt, Gurnemanz, the old and wise knight, invites Parsifal to the Hall of the Grail. A prophesy says that a young and chaste fool will recover the Spear from Klingsor, and cure the shameful wound of Amfortas. Gurnemanz wonders if Parsifal might be that person. He invites Parsifal to witness the Holy Rite of the Grail. The scenery gradually changes. Parsifal marvels at the fact that he barely walks, and yet seems to have come so far. Gurnemanz replies that in Montsalvat, time becomes space.

The trombones and the bells of the ceremony become prominent and we are ushered into the Hall of the Grail. Its architecture and acoustics are grandiose: Amfortas and the knights are seated in the center front, adolescents sing from the gallery, and high above is a mystical chorus of children. The ceremony begins. The Grail is unveiled and twice it glows, irradiating hope and bliss. In a slow procession, the knights are invited to share the bread and wine from the Sacred Cup. They sing with increasing strength and joy. While they walk away, however, we are reminded that Amfortas bled and suffered throughout the ceremony: he can only be healed by the missing Spear. Parsifal watches, mesmerized and silent.

We skip almost two acts, and many years. Parsifal has vanquished Klingsor, the magician, and resisted Kundry, the magician's seductress. For years, he has wandered with the Spear without understanding its importance. But Gurnemanz brings him again to the Hall of the Grail. Parsifal presents the Spear to the knights, and heals Amfortas by touching his wound. Amfortas dies, transfigured, and Parsifal takes his mantel as king. Mystical choruses praise the fulfillment of the prophecy. The opera ends in mixtures of different slow meters (four and six) that suggest the return of perfect harmony to Montsalvat and to the world.