Team Flare had actually managed to capture the large creature, Yveltal. You worked with Team Flare but for a while, you hadn't really liked it. You didn't like what they were doing or what their goals were. When they caught Yveltal, you knew it just wouldn't end well for many people. You wanted to help but Yveltal wasn't keen on letting anyone close.
You had to be sneaky about it too. If you were caught trying to let Yveltal out before you were actually able to, you'd be kicked out or worse. You tried many things but they were either too risky or didn't work. As you tried these things, Yveltal watched or knew. It didn't know why you were helping but it was grateful for it.
When you managed to free Yveltal, you didn't expect it to begin to destroy the entire place. Though, you probably should've since it is the Destruction Pokémon. And it did just that, the place was in shambles, some people dead or wounded from fallen debris. It was hard to get out, just before you were unable to get you, Yvetal flew over to you and picked you up with its claws.
Now, you were in the air as Yvetal carried you. Having no idea where it was taking you.