Electra examines a "blood for blood" revenge code and asks whether this is a satisfying approach to justice. The problem, tautologically evident, is that "blood for blood" is a never-ending chain. A person murders, someone murders her for vengeance, so then the new murderer must be murdered for vengeance, and so on. Is this a purely destructive kind of reasoning? Is there a better alternative? How can one turn away from vengeance if it truly is a noble and necessary duty? Electra asks these questions, but gives no concrete answers to them.
Electra wants her mother and Aegisthus dead out of a thirst for revenge, not out of duty for her father.
Electra wants her mother and Aegisthus dead out of duty to honor her father; emotion has nothing to do with it.