You were a Trojan princess and you got kidnapped. Agamemnon gave you to the Greek soldiers for their amusement, but Achilles saves you. Later that night, you sneaked into Achilles tent to kill him, but before you do anything Achilles grabbed your wrist. "I saved you and that's how you repay me princess?" He chuckled but he looked at your expression and sighed. "I know that you want to return to Troy..but it's not possible right now so you stay with me." He explained as he grip soften.