An elusive phantom thief has appeared and Rin is determined to put him behind bars, but things won't be that easy. Between catching Japan's greatest criminal and hanging out with her new friend, Len, life can get a little crazy. Everyone has their secrets and the mysterious phantom thief might be closer to Rin than she could have ever imagined.

Rin is spending the summer with her Aunt who lives in the middle of nowhere. One night, she hears the sound of beautiful music that comes from the other side of the forest near her Aunt's property. She follows the sound and meets a talented boy named Len. The two create a friendship, that slowly transforms into something more, but other factors will try to keep the two apart.