X was a Pokémon Trainer child prodigy. But now he's depressed and hides in his room avoiding everyone--including his best friend Y. An attack on their hometown by Legendary Pokémon Xerneas and Yveltal, led by Team Flare, forces X outside... Now what?

X, Y and friends arrive in the nick of time just as journalist Alexa is attacked by her editor-in-chief and his Pangoro! Then, together with a new ally named Clemont, our friends come to the aid of an unhappy Electrike in search of a Mega Stone.

Will Team Flare find the Mega Stone before the good guys...?