"Exactly How Far Back Did We Go, Wilbur?"

This is Book 2 (after Futuristic Four)

If you could fix every mistake you've ever made with the press of a button, would you?

What if by pressing that button, you were hurting people you didn't know and would never meet?

What if by pressing that button, you were hurting the person you care about most in the world, but they'll never know it was you?

Hiro can't understand how the people who appeared out of the sky know him, or why they're so desperate for his help. He's just a kid who's struggling to follow his brother Tadashi's example. What does this "Wilbur" have to do with it? What about "Penny?" And maybe most importantly of all, who is "Violet?"