Knights and Demons

in another timeline of the modern world in 1484 an ancient order no longer needed as the kingdoms have agreed to peace and the medieval era is slowly coming to an end, but then a change occurs, a ritual is made and an old evil arises and unleashes an army of demons, corrupting the residence and knights alike, the call orders you,  rise and bring back the old order and push back the tides of the evil demonic incursion