"Kurayukaba" follows detective Soutarou as he delves into the mysterious "mass disappearance" that has left the town in turmoil. As he follows the ominous tracks left behind, he uncovers a hidden underground world known as "Kuragari." Here, he encounters the enigmatic black iron armored train and its formidable commander, Tanne.
As Soutarou delves deeper into the underground realm, he unravels the secrets and mysteries that shroud both the town and the train. He discovers that the train holds the key to solving the mass disappearance and must navigate through various challenges and obstacles to unveil the truth.
Throughout the movie, Soutarou's investigation takes him on a thrilling and suspenseful journey as he encounters strange and mystical characters, uncovers long-buried secrets, and ultimately unravels the true nature of the "ominous tracks" and the mass disappearance.
The movie is a blend of mystery, fantasy, and adventure, as Soutarou navigates through the surreal landscape of "Kuragari" and confronts the unknown forces that threaten the town's existence. The film promises a captivating and immersive story that will keep viewers on the edge of their seats until the very end.