While heading for a hot spring, Kindaichi and his friends lose their way and wander into a shabby, foreboding hotel. Locals whisper that a vampire once haunted the place. A girl was found in the cellar six years ago, marked by bites on her neck; the villagers executed her. Recently, a guest was murdered and Miyuki was bitten by a fanged creature, making it seem the vampire remains alive. Despite reassurances, guests hear whispers and see shadowy figures at night. The group feels uneasy as they confront the possibility that the vampire may still roam.