Antigone is a daughter of the accidentally incestuous marriage between King Oedipus of Thebes and his mother Jocasta (thus, Antigone is also her father Oedipus's half-sister and, through her father, her mother Jocasta's granddaughter). She had two brothers, Eteocles and Polyneices, and a younger sister, Ismene.
Eventually her father is banished and dies. Then she and her siblings are left in the care of her uncle Creon. Her brothers start fighting for the kingdom. Polyneices is killed and loses the war. Creon does not bury him and proclaims that he will kill anybody who does. Antigone loves her brother and is brave and goes and buries her brother. A guard saw her and told her uncle. She is sentenced to die in a cave. Antigone goes proudly to her death. He betrothed, Creon's son Haimon, finds out and his mad at his father. He goes to rescue Antigone but found she had hung herself. Haimon then kills himself as well. When this is found out, Haimon's mother Eurydice, kills herself.