Egeon is about to be sentenced to death as he is not allowed to be in Ephesus because he comes from Syracuse. He is allowed to pay 1000 marks but does not have enough marks.
He explains to the Duke, Solinus, that he lost his family 25 years ago in a shipwreck and is in Ephesus to find them.
Solinus is touched and gives him a day to find somebody to pay 1000 marks for him.
He has twins, both named Antipholus, and they have slaves, both named Dromio. We will classify the Antipholus on the left as Antipholus E and Dromio E. We will classify Antipholus on the left as Antipholus S and Dromio S. Antipholus E has a wife named Adriana.
Antipholus S and Dromio S comes to find their missing family. As Antipholus S is exploring the city of Ephesus, Dromio E shows up, thinking that this is Antipholus E, and insists that he comes home as Adriana is getting impatient. Antipholus S is confused and slaps Dromio E.
After all the confusion, Abbess, the wife of Egeon, reveals the twins and slaves and solves all the problem. In the end, everybody lives happily evr after.