Witch Hunting and Anecdotes

A series of murders of unmarried girls occurred in the village. The church suspected witches, but it was the abbot who was finally tried. However, all this is far from over: the knight errant Martin volunteered to go deep into the forest to investigate the truth, but was lured into the trap of corruption again and again. The truth was revealed layer by layer, but was covered up layer by layer. Between the forest full of monsters, the terrifying swamp and the witch's black crystal castle, who is planning this ingenious conspiracy that seems to be coincidental? How did the loyal and brave knight unknowingly turn into a sinful devil?