One night. Just as their calling card declared, they appeared at the museum. Tonight, their target is one thing only. The legendary masterpiece, "Maiden Under the Moonlight" With the help of an insider lurking in the museum, they steal the masterpiece, pull one last prank, and retreat. A perfect scenario. ...That said, the pranks themselves are nothing but childish. Drawing mustaches on the masterpiece, placing incomprehensible objects, and so on. That is the kind of mischief they have come to carry out.