And he starts singing.
The story is that there is a hidden kingdom in the mountains, enchanted so that none who haven't been there can ever find it, and none who have can ever leave. The kingdom's princess is restless and unhappy, and she demands leave to go free, and the King grants this with strict instructions and an escort. She loses the escort on the first day and fights her way through the forest of giant spiders and comes to another kingdom, where an old friend lived. He is absent but his people know and welcome her, and she rides the countryside, going farther and farther, seeing more of the world.
And then she wanders into a magical enchanted forest, and the man who designed the forest decides that he does not want her to leave. So he turns all the paths until none lead out, and she wanders until she is frightened and hungry, and then he welcomes her and invites her to join him and they are married that evening.
And for fifty years her friends search for her fruitlessly, and eventually they learn she is in the enchanted forest but not how she came to be lost there, or that she cannot leave, and it would start a war if they invaded so they don't, and she bears a child and the child grows up and when he is grown he asks his mother if together they might be able to break the enchantments and leave.
And they do.
And she flees to the home of her friend, and this time he is present, and she says only that she requires fast horses, so he gives her fast horses and bids her farewell. When her husband comes dashing across the land after her, her friend strongly advises him to go home but does not draw his sword. And traveling faster with magic, he catches up to her as she reaches her secret city, and tells the guards of the secret city that he is her husband, and he is brought with due honors before the King, who welcomes him as a brother but explains that he may never leave.
And in anger her husband draws a weapon and throws it, saying that if only by his death he will depart this place then he and his son will die here, but the princess protects her child and is injured in the shoulder and dies in the night, as the weapon was poisoned.
He stops there. "This is the friend I want you to bring back," he says, "and it's my fault because I didn't kill him when I had the chance."