After reading about twelve of these kinds of plays, they start melting into each other. Sad betrayal of honor, unnecessary deaths, yadda yadda. It would be more interesting if people had to actually live with the consequences of their actions, but I guess that option sucked in the 18th century.

Anyway, Emilia Galotti is a beautiful virtuous maiden who gets about two scenes of dialogue while everyone else talks about her for the rest of the play. She wants to get married, but the local prince wants her and his servant arranges for her fiance to die horribly so she is in his power. It's a commentary on power corrupting and legal systems becoming obsolete in the face of power, especially shown in how the prince just doesn't really care about the trail of destruction he leaves in his wake as long as he gets what he wants.

In summary, meh. There are about twelve billion of these plays. I get that Goethe was enthused by it, because he went on to write about three of the same kind of play, but having read them out of order, it stops being novel.