The Ivory Door
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The first act (a prelude) has the old king working alone in his private room when his young son, Perival, enters. After the two discuss such subjects as love, marriage, governing the kingdom, and the inevitability of death, the conversation turns to a door behind a tapestry. Perival says there are rumors that anyone who walks through the ivory door will be killed by the demons in the passage inside. The king says that he does not know whether that is true or false, because he has never been through the door and does not know anyone who has. He shows Perival the door and warns his son to not tamper with things beyond his understanding when he becomes king.
Perival, now a young man who has been crowned king upon his father's death, frets over his upcoming marriage to Princess Lillia, the daughter of a king from a nearby land. His sergeant-at-arms Baram comforts him, saying it is natural to be nervous about a marriage to a woman he has never met, and suggesting he should do something to distract himself. King Perival decides to go through the ivory door, and Baram reluctantly agrees to the plan, but only after Perival agrees to return within three hours or be declared dead.
Behind the door, Perival finds a tunnel. His clothes become dirty and torn as he walks through the tunnel, but he is not otherwise injured. He emerges into bright sunlight beside a nearby river, and decides to walk back overland to the castle. Along the way, he is distracted by mummers who are traveling to the castle to perform at the upcoming wedding. Then Perival hears the alarm bells from the castle and a crier announcing the death of the king. He returns to the castle but is not recognized because his clothes are torn and soiled. When he claims to be the King, he is called an impostor. He protests that he went through the tunnel behind the ivory door, but Baram calls him a "demon" and orders his arrest.
Princess Lillia confronts Baram and demands to know why the king was arrested. Baram says that it was not the king, but rather a demon who had emerged from behind the ivory door to impersonate the king and lead the kingdom astray. Lillia is convinced that the stories about the ivory door are nonsense and before Baram can stop her, she opens the door and walks through.
Lillia, now dirty and wearing torn clothing, is thrown into Perival's dungeon cell. They do not recognize each other, as they have never met, but soon realize that they are the king and his betrothed. They are eventually let out of the cell, and taken to the throne room, where Baram is standing before a large crowd. Baram accuses Lillia and Perival of being demons, and Perival insists that there is nothing behind the ivory door but a very ordinary passage. No one listens to Perival.
Eventually, Baram speaks with Perival and Lillia privately. He tells them that he knows who they are, but the people's fear of the ivory door is too great to allow them to believe that there was really nothing there all along; they believe in the demons and want to kill them. Perival protests that he knows there are no demons because he didn't see any when he went through the passage. "Do not take our stories away!" is Baram's response.
Baram says he will do what he can to save Perival and Lillia's lives, but they will have to leave and never come back. Lillia protests that she is a princess and knows nothing of survival and Perival is likely no better; Baram says that he is sure they will find a way because they have seen the truth. Perival says that at least he and Lillia will be together, but his words ring hollow because, as Lillia points out, they only just met that day and if they aren't getting married for politics, they should see if they like each other before getting married. Baram assumes the mantle of Protector of the Kingdom and orders the "demons" exiled.
Some productions include an epilogue, in which an old man wearing a king's crown listens to a young boy ask if the stories about how Baram the Great defended the kingdom from demons are true.
The play is an overt criticism of religious dogma, in which Perival and Lillia are presented as heroic figures who learn the truth about myth and legend. Milne encourages the audience to look at their own religions, particularly Christianity, as a set of mythological stories no more to be believed than the stories about the demons living behind the ivory door in Perival's kingdom. Left open to audience is debate is the matter of whether Baram is a hero also, for keeping the peace and maintaining the status quo, or a villain for perpetuating a lie, however well-intentioned it might have been. Also left open to interpretation is the role that mythologies and other factually inaccurate stories play in a society.