What is the goal of the protagonist? to bury Polyneices to overthrow Creon to frame Isemene to bury Eteocles

The goal of the protagonist is to bury Polyneices.

To add, In Greek mythology, Polynices was the son of Oedipus and Jocasta. His wife was Argea. His father, Oedipus, was discovered to have killed his father and married his mother, and was expelled from Thebes, leaving his sons Eteocles and Polynices to rule.