The 8-cylinder engine of the 1970 Plymouth Barracuda hummed as the jet black vehicle cut a swath down the lonely highway. Behind the wheel, Logan Adler turned his gaze from the road to give his younger brother Jacob "the look".

"You're doing it again," he said, peering through his Oakley sunglasses.

"Doing what?" asked Jacob, not returning his brothers stare.

"The sulking. Every time we leave an investigation, you just sit there staring out the window, doing your little pouty thing. Jus...