A midsummer night's dream

This is a story written by Shakespeare. There are two men and two women. Lysander and Hermia love each other but Hermia’s fiance Demetrus loves Hermia, too. And his ex-girlfriend Helena still loves Demetrus. Hermia and Lysander meet in the wood with the intention of running away and getting married secretly. Demetrius follows them and Helena follows Demetrius. How can they all be happy?