One night, Oto notices strange wet footprints in front of Sumireko Ogawa’s house. The footprints look like someone walked there with water dripping from their feet, even though there is no rain or obvious reason for them to be wet.
This strange situation makes Oto suspicious, and she starts thinking that the footprints might be connected to another supernatural urban legend. The atmosphere becomes tense as they try to understand who or what left the footprints.