It is explained that Priam sent Polydorus to Thrace with payment to the Thracian king so that he would be protected if Troy fell. When Troy did fall, the king broke his pact with the Trojans, killed Polydorus in order to ingratiate himself with Agamemnon and kept the payment. Aeneas goes on to give Polydorus a proper burial. According to the tradition of Hyginus’ "Fabulae", Priam and Hecuba entrusted Polydorus’ upbringing to his sister, Iliona, who was the wife of Polymestor. In order to ensure Polydorus’ safety, she raised him as her own son, while she raised her and Polymestor’s true son, Deipylus, as her brother. After the fall of Troy, the Achaeans offered Polymestor Agamemnon’s daughter Electra to be his wife if he killed Polydorus. Polymestor agreed, but because of the switch that Iliona executed, he instead killed Deipylus. As this occurred, Polydorus went to the oracle of Apollo in order to learn of his true parentage. Here he was told that his home city had been destroyed, his father killed, and his mother captured. Upon returning home, and still believing that he was the son of Polymestor and Iliona, he asked Iliona why the oracle had been wrong, at which point she tells him the truth of his ancestry. He proceeds to blind and kill Polymestor at his sister’s advice.