The game was unveiled in the latest issue of Dengeki PlayStation. Shin‘s protagonists are two young girls named Yui and Haru and a synopsis of their story is as follows (translation courtesy of Gematsu):
In order to see the end of summer vacation fireworks in the neighboring town, Yui and Haru went out to the mountains. On the way back home, the two are accidentally separated and get lost. They roam around in search for each other, but an ominous night town has spread out before them. Will the girls be able to safely reunite?