Segismundo a sedative that "robs one in his sleep of his sense and faculties" (109), which puts him in a sleep similar to death. In the Royal Palace of the capital city of Warsaw, Clotaldo has learned that Rosaura is a woman; Clarín explains that Rosaura is Princess Estrella's maid but has been going by the name of Astrea. When Segismundo is awakened and arrives at court, Clotaldo tells him that he is the prince of Poland and heir to the throne. He resents Clotaldo for keeping this secret from him for all those years. He finds Duke Astolfo irritating and is dazzled by Estrella's beauty. When a servant warns him about the princess's betrothal to Astolfo, Segismundo is enraged by the news and throws the servant from the balcony. The king demands an explanation from his son. He tries to reason with him, but Segismundo announces he will fight everyone, for his rights were denied him for a long time. Basilio warns him that he must behave, or he might find out he's dreaming. Segismundo interrupts a conversation between Rosaura and Clarín. Rosaura wants to leave, but Segismundo tries to seduce her. Clotaldo steps up to defend his child, but Segismundo pulls out a dagger threatening to kill him. As Clotaldo begs for his life, Astolfo challenges Segismundo to a duel. Before they proceed, the king sedates the prince again and sends him back to his cell. After recriminating Astolfo for wearing another woman's portrait around his neck, Estrella commands Rosaura (still going by Astrea) to fetch this locket for her. When she approaches Astolfo for the locket, he says he recognized her as Rosaura and refuses to give her the locket, because the portrait inside is hers. Estrella walks in and demands to see it immediately, but, afraid of being discovered, Rosaura says the locket in Astolfo's hand is actually her own, and that he has hidden the one she was sent to fetch. Estrella leaves furious. Meanwhile, Clotaldo sends Clarín to prison, believing that Clarín knows his secret. Segismundo mutters in his sleep about murder and revenge. When the prince wakes up, he tells Clotaldo about his "dream". Clotaldo tells him that even in dreams, people must act with kindness and justice. When he leaves, Segismundo is left reflecting on dreams and life. Act III The people find out that they have a prince and many rebel,