The Potion That Could Not Be Undone
A cup of wine, mistaken for another, binds a knight and a queen in a love neither crown nor exile can break.
Tristan arrives at the court of his uncle, King Mark of Cornwall, an orphan of Blanchefleur and King Rivalen, but a young man whose knightly spirit quickly earns him his uncle's trust. When Mark seeks to marry Iseult, the golden-haired daughter of the Irish king, it is Tristan who is sent to broker the match — a mission that will unravel both their lives.
Iseult does not resist the political marriage, but she wants love from the husband she has never met, so her mother prepares a potion meant to bind Mark's heart to hers. The precious draught is entrusted to Iseult's companion Brangane, who seals it in a wine flask for the sea voyage to England.
Aboard the ship, while Brangane is away, Tristan — attending to Iseult — searches for wine to comfort her and unknowingly pours from the very flask meant for Mark's wedding night. Neither he nor Iseult knows what they drink. By the time Brangane returns, it is too late: the two are irrevocably in love. Later tellings of the legend disagree on how long the potion's hold lasts — in the courtly telling it binds them for life, while in another it is said to fade after three years — but in either case, the two are helplessly drawn to one another from that moment on.
Knowing the danger such passion poses to their lives, Tristan and Iseult keep their love secret, meeting in stolen moments even after Iseult's marriage to Mark proceeds. But whispers reach the king, and he learns of a meeting place by a lake. Hiding there, Mark nearly catches them — until the lovers, spotting his shadow among the trees, improvise a conversation implying their innocence, enough to shame Mark into treating them kindly again.
The rumors do not stop, and suspicion gnaws at the king until he asks the lovers to leave his court. They flee into a forest and shelter in a cave, where pursuers again report their location to Mark. But when he creeps in to see for himself, he finds them lying apart, a sword laid between them — an old symbol of chastity — and, moved, invites them back to court with honor.
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