Helena loves Demetrius, but Demetrius loves Hermia. Hermia loves Lysander, who loves her in return, but Hermia's father does not approve of the match.
To avoid her father's disapproval and the strict rules of Athens, Hermia and Lysander have run away together, with Demetrius and Helena closed behind. But their journey is long and first they must all spend the night in the wood, a pace where fairies rules,
Puck is then sent to find Helena so that Oberon may correct the mistake and make Demetrius fall in love with her. Through Oberon's intervention, then, the tables have turned, and Helena finds herself with two suitors while Hermia is left with none.