Having quit his corporate job, Hajime Kindaichi established the "Kindaichi Detective Agency" to dedicate himself to raising his child with his childhood friend, Miyuki. However, after opening, there were no cases, and the office was deserted. Then, one day, a phone call came in. A mysterious person who only identified themselves as "the client" told Kindaichi about a job with a fee of 1 million yen. The job was to "find something in an abandoned inn"—. Confused by the inexplicable request, Kindaichi heads to the scene with his "new partner"—.