Whenamedievalmonkunexpectedlydiesinahorrificway,theChurchsendsMatehotheInquisitor,arationalmanofscience,toinvestigatethealleged'witch'.WhenMatehohimselfbecomesimplicatedasmoremonksdiemysteriously,hemustlearnthatsciencecannotexplainthehorrorsaroundhim,beforeheisseducedbytheevilthathauntsthismonastery.