Monastery of the Crimson Monks

Beatriss and Tetsukichi had been away from the Happy Valley-- and their families for more than a year.  Beatriss's children, being half-spiritfolk, were causing trouble.  For others.  And maybe themselves.

Damai, a skilled hunter and tracker offered to help the local community find non-harmful way to keep their animals safe from the foxes that were probably the children of their local ruler.  What he found was that at least one of the "foxes" wasn't chickens for food or even sport.  They were gifts.  Gifts for someone that lived up in the unexplored hills on the west side of the valley.  Damai followed the tracks and found a small pile of chicken corpses outside the entrance to what looked like a small cave formed by a rockslide-- but proved to be the entrance to something larger and intentional.  There were stairs carved into the stone, and a door.

Based on Damai's report, Beatriss, Tetsukichi, and their associates went to investigate.  They explored an eerie complex of rooms that was clearly one something and in dissembling might become something else.  There were shrines dedicated to sinister spirits, defaced in a way that made them more sinister.  And there were bakemono and goblins, many of them, in all colors and shapes, their only common feature being that they were dead.  There was a large room with a vaulted ceiling, whose only notable feature-- sockets carved into the stone walls-- hinted at some notable purpose that the explorers could not discern.

And there were people.  People in red robes, who greeted them with grave, menacing civility.  They were members of a religious order, and they were visiting.  Beatriss, hoping for more information, volunteered that some children from her village had been exploring in the hills and stumbled upon the entrance.  The robed visitors wanted to meet these children and offered a reward.
Beatriss agreed to bring them.  And then got out as quick as she could.

Returning home, Beatriss questioned her children and found out that they had been feasting and playing with the bakemono.  Beatriss told them that their playmates were all dead and not to go back to the cave in the hills.