Lysander and Demetrius love Helena.
Helena loves Demetrius.
Hermia loves Lysander.
Hermia wants to marry Lysander but her father wants her to marry Demetrius.
Puck accidently pours "love juice" in Demetrius' eyes to make him fall in love with Helena.
Puck also pours the "love juice" in Lysander's eyes to make him fall in love with Helena aswell.
Hermia gets angry because she thinks Helena stole her man.
Lysander stays with hermia after trying to elope.
Demetrius (still under the spell of Puck) stays with Helena.
Egeus is Hermia's father.
So Demetrius and Lysander love Helena so they find somewhere to fight.
Helena follows Demetrius and Demetrius tries to tell her to get lost.
Lysander follows Helena and keeps saying he loves her.
Helena tries to keep him away.
In the end, Demetrius goes with Helena and Iysander goes with Hermia.