White deer already belonged to the marvellous landscape of medieval Celtic and French storytelling before the Arthurian hunt was fixed in romance. A pale animal could signal that an ordinary forest had become a threshold to something stranger. Marie de France uses a white antlered doe in Guigemar, where wounding the animal brings a supernatural wound and redirects the hero's life. The Arthurian White Stag develops that same sense of a hunt that becomes more than sport.

In Erec and Enide, Arthur holds court at Cardigan during Easter and announces that he will revive the hunt of the white stag. Gawain objects because the custom carries a dangerous reward. Whoever kills the stag must kiss the lady judged fairest at court, while hundreds of knights are present and each believes his own beloved deserves that honour. Arthur refuses to abandon the tradition and the company rides into the forest.

The hunt divides the court. Arthur and the hounds pursue the stag, while Queen Guinevere, Erec and a maiden stop elsewhere in the woodland. There they meet the armed knight who becomes Erec's rival, his lady and the hostile dwarf who strikes Guinevere's attendant and lashes Erec. Erec cannot answer the insult without armour, so he follows the strangers. By the time Arthur kills the white stag, another adventure has already begun on a different road.

Erec eventually returns with Enide after winning the sparrowhawk contest and defeating the knight who allowed the insult. The stag custom now reaches its conclusion. Arthur's court must decide who deserves the kiss attached to the hunt, and Enide is recognised as the lady worthy of the honour. The animal itself is dead, but the custom surrounding it has helped connect the hunt, the pursuit, Erec's marriage and his restoration to court.

The Welsh Geraint ac Enid adapts the same sequence around Geraint, Enid and Edern son of Nudd. Malory's Le Morte Darthur later introduces a separate white hart at Arthur and Guinevere's wedding feast. This hart rushes through the hall with a white brachet and black hounds in pursuit, and its appearance sends knights into new adventures. These animals should not be treated as one literal stag travelling through every text. They belong to the same Arthurian pattern: a white quarry enters or escapes, courtly order breaks open, and the story moves into the forest.