Act 3, Scene i

Hermia loves Lysander but has to marry Demetrius or be killed.

Hermia and Lysander escape into the woods, followed by Helena and Demetrius.

The "Rude Mechanicals" prepare a play for Duke Theseus's wedding.

Oberon and Titania, King and Queen of the Fairies, fight over a changeling child.

Oberon sends his henchman, Puck, to retrieve a flower that can cause people to fall in love with the first living thing they see. He plans to use it on Titania to blackmail her into giving him the child.

Puck retrieves the flower. Oberon puts the flower juice on Titania's eyes. Oberon also tells Puck to use the flower on Demetrius, so that he will fall in love with Helena, but Puck mistakenly puts the juice on Lysander, causing him to fall in love with Helena instead.