Robin Goodfellow put the potion on the wrong Athenian,now Lysander will wake up and fall in love with whatever he lays eyes on first.
reverse the potion
Hermia loves Lysander and only wants to marry him. Hermia's father has different wishes and forces her to marry Demetrius or be sentenced to death.
Hermia and Helena get into a huge fight over Demetrius and Lysander loving Helena instead of Hermia. Hermia becomes very confused and upset with Helena for stealing her love.
Robin Goodfellow went back and fixed his mistakes of putting the potion on the wrong person. Since the potion is reversed this causes Lysander to love Hermia once more.
I suddenly love Hermia again!!
Lysander and Hermia work out a plan to run away and get married. They assume that doing this will allow the problems of not having her father's wishes go away.
In the end Hermia and Helena make up because of the potion being removed from Lysander. Demetrius is still under the spell and loves Helena, but it all works out because everyone is with who they are meant to be.