Shiraishi An is an ace detective, being able to solve every mystery with her partner for almost two years. And recently, she and her partner have been assigned a new case. It was about a phantom thief, leaving cryptic clues and hints around sites they've been at. Unfortunately though... they haven't been able to get even close to solving it.

"Ahh... what the hell does this mean?!"

An yells out at her desk in exasperation, having been staring at a single photo for a half hour with no idea what the fuck it means.