Jo and Callum walked up the middle of the street toward me, their faces pale even behind my tinted sunglasses. I'd been riding in circles around the neighborhood, trying not to kill anything, until I wound up at my house again.

"I've been texting you for hours. Where have you been?" Jo's voice was gentle, not scolding. I could tell from the look in her eyes she knew something was wrong, more wrong than it already was.

Callum shrugged off the backpack he carried. His ...