Etsuro walks home in the rain with an elderly gentleman he met at the train station taxi stand, and the man starts talking about his dog. The dog's name was Six, and one day he randomly started following a young woman. In this odd story, the woman had been having reoccurring dreams about Six, but it was her first time to see the dog in person. She and Six took a liking to each other in her dreams, but then Six would die right away. Etsuro finds himself intrigued by the spooky tale. He thinks it was just an odd story, but it turns out there's more. Why is Etsuro so terrified, and who exactly is this elderly gentleman?