The Mad King demands for Lyanna Stark to be held hostage in the Red Keep, where Jaime Lannister befriends her. He makes a promise he couldn't keep. Years after her death, he meets Arya Stark, who reminds him of Lyanna. Jaime is determined to honour his promise by protecting her, but the die has been cast and chaos reigns.

Arya is reborn as Arianne Lannister, the daughter of Tywin Lannister. She still has the memories of her life as Arya Stark. She vows to ensure that past mistakes are not repeated, and the seven kingdoms stay united against the Others. However, a new prophecy is made, a new bond is forged and an unexpected villain threatens to thwart her plans.

Arya is excited to begin her Pentathlete training at the Lannister Training Centre. However, she stumbles upon an uncomfortable truth, and realises that everything is not how it seems in King's Landing. Can Arya survive the lion's lair?