There has been a rumour about blood magic being performed out by a Tori Gate in a valley near the city. Heading to the valley, it is very muddy, marshy and stinks horribly like a tannery. Passing an eta with a stuck cart on the path, we approach a rather pathetic eta village. The people here look sick and wretched.
At the other side of the village is a tannery, next to the tannery is a rock and on the rock is a man playing a flute. When asked, he tells us that the gate is down the path, but that we might not be able to get to it.
Find the corrupted tori gate. Find some blood speakers doing evil things in an abandoned monastry. We raid it, burn lots of things and kill the survivors.