Plutarch begins his biography of Pyrrhus by recounting the myths and history surrounding his family, the ruling family of Epirus, which traces its descent to the hero Achilles and his son Neoptolemus. When Pyrrhus is still a child, his father, King Aeacides of Epirus, is expelled by the Molossians, who replace him as king with Neoptolemus. Pyrrhus is saved, however, by some of his father’s friends. He is brought up by King Glaucias of Illyria, who educates him and restores him to his rightful throne when he is 12. Plutarch describes Pyrrhus’s unusual appearance, especially his irregular teeth. His right foot was also believed to possess healing qualities.

When Pyrrhus is 17, Neoptolemus tries to seize Epirus while Pyrrhus is away. Not having the resources to drive Neoptolemus out, Pyrrhus goes with his brother-in-law, Demetrius, to fight against Ptolemy in Egypt, where he distinguishes himself as a great soldier. In Egypt, he marries Antigone, one of Ptolemy’s daughters, who helps him get the men and money he needs to win back his kingdom. Pyrrhus initially agrees to share the kingdom with Neoptolemus, but he eventually kills him when he discovers that he is plotting to assassinate him.