Final Fantasy XIII-2 Part 1: A Sister Lost

Victory was achieved against the Fal'Cie and Cocoon was saved. Lightning however, did not get to enjoy her happily ever after for she now serves the goddess Etro as her champion in Valhalla against forces poised to bring even greater destruction to the world than the Fal'Cie ever could. To help with her quest, Light recruits her sister Serah who believes her lost and is given a change to not only help save the world but to bring Lightning home.