In at least 150 words, provide a synopsis or summary of the events of Act I, Scene 1 of A Midsummer Night's Dream. Include a description of the main characters and the plot.

Theseus, the Duke of Athens, is preparing the city for a large festival to mark his imminent marriage to Hippolyta. Egeus, a nobleman, enters the stage accompanied by his daughter Hermia, the man she loves named Lysander, and the man Egeus wants her to marry named Demetrius. He begs Theseus for the ancient Athenian right to either make his daughter marry Demetrius or have the power to kill her.

Theseus offers Hermia only two options: she must marry Demetrius or join a nunnery. He then departs with the other men, leaving Hermia and Lysander behind on stage. Lysander quickly convinces Hermia to sneak into the woods the next night so that they may get married at his aunt's house outside of Athens. She agrees to the plan.

Helena arrives and laments the fact that Demetrius only has eyes for Hermia, even though she loves him far more than Hermia ever could. Lysander tells her to not worry since he and Hermia are sneaking away that night. Helena, in a final soliloquy, indicates that she will tell Demetrius about Hermia's plans because that might make him start to love her again.