Sir Orfeo, a king in England, loses his wife Heurodis (i.e. Eurydice) to the fairy king, who steals her away from under an ympe-tre (a tree propagated by grafting), probably an apple or cherry tree. Heurodis had visited the orchard the day before, accompanied by two maidens, to sleep beneath the shade of its branches; however, when she had awoken from her midday nap, she was so distressed that they had to call for the help of knights to restrain her. In her sleep, she had been visited by the king of the Otherworld, she claimed, who was intent upon taking her to his underworld kingdom. Now, a day later, she is in the orchard again, as the king of the Otherworld has instructed her to be, and despite a posse of armed knights surrounding and protecting her, she vanishes away.
Orfeo, distraught by this, leaves his court and wanders alone in a forest. He has left his steward in charge of the kingdom and seems to have no intention of returning to his capital city of Winchester (in southern England, the old capital of the Anglo-Saxon kingdom of Wessex). Winchester was called Thrace in those days, the reader is assured. Sir Orfeo leaves instructions that when they learn of his death, they should convene a parliament and choose a new king.
Sir Orfeo wanders in the forest for many years, sleeping on the bare earth and living on berries and fruits in summer, roots and the bark of trees in winter. After ten years, he sees Heurodis riding past in the company of a fairy host. She is riding with sixty ladies, with not a man among them, hawking by a river. He follows these ladies into a cliff and travels for three miles through the rock until he emerges into a fairy kingdom, a flat expanse of countryside presided over by a magnificent castle, built from gold and crystal and glass. He is allowed into the castle by the gatekeeper and looking all about, he sees, lying inside these castle walls, people who had been thought to be dead, but who were not:
- "Than he gan bihold about al,
- And seighe liggeand within the wal
- Of folk that were thider y-brought
- And thought dede, and nare nought."[5]
Some were headless, others had been drowned or burned:
- "Sum stode withouten hede...
- And sum were in water adreynt,
- And some with fire al forschreynt."[6]
Amongst these bodies he sees his dear wife Heurodis, asleep again. Despite suffering a rebuke by the king for being the only person ever to have entered this castle without having been summoned, Sir Orfeo entertains the fairy king by playing his harp and the fairy king, pleased with Orfeo's music, offers him the chance to choose a reward: he chooses Heurodis. Despite initial protestations by the king, Sir Orfeo reminds him that he gave him his word and Sir Orfeo returns with Heurodis to Winchester:
- "To Winchester he is y-come,
- That was his owhen cité,
- Ac no man knewe that it was he."[7]
Sir Orfeo arrives in Winchester, his own city, but nobody knows who he is. He takes lodgings with a beggar and, leaving Heurodis safely there, travels into the city wearing the beggar's clothes, where he is insulted by many people for his unkempt looks. The steward, however, for the love of Sir Orfeo, invites this unknown musician into the castle to play his harp. The final action of the story is the testing of the steward's loyalty upon Sir Orfeo's return with Heurodis to reclaim his throne. Quickly, the harp is recognized and Sir Orfeo explains that he found it ten years ago beside the mutilated body of a man who had been eaten by a lion. Upon hearing this, the steward faints in distress and grief. The beggar then reveals to the court that it is Sir Orfeo himself who is speaking to them and when the steward recovers, he is assured by Sir Orfeo that, if he had been pleased to learn of his death, he would have had him thrown out of his kingdom. As it is, however, he will make him his heir. Heurodis is brought to the castle and all the people weep for joy that their king and queen are alive and well.
