Roxas meets Xion, she reveals to him who she really is and she shows him proof that he as a key blade. after he was attacked.

In this chapter, Roxas finds out the truth of his mother, goes to school, makes friends, finds out what a key-blade is, and gets attacked

Kingdom Hearts: Lost Hope is a story of Roxas who grew up poor and wasn't treated the best. As he grew up things started to get weird, he would notice men dressed in black watching him from far distances, they are Blade Hunters (someone who hunts down key-blade wielders for ransom). All of his misfortune bring out his key blade, called Hope of Light