Mia looks into my eyes, searching for something. "Ava visited me last night. We talked about what I know about her," she says. "Leo, her power is connected to emotions. If you two mark each other, your emotions could help take her powers to another level."

I'm confused, but something clicks. Even Axel, who's been listening to her story, looks strange.

"So if we mark each other, Ava could use my emotions?" I ask.

"I don't know exactly how her power ...