Fate Magnus Bellum

On the eve of the Great Holy Grail War, Ruler summons a Servant to aid her in duties as mediator. Answering her call, Saber appears. A knight whose ties to the Holy Grail War runs deep. Both set out on their journey, soon realizing that an even greater conflict was on the horizon. Uniting both Red and Black, a battle to save the world begins. This is the tale of a Saint and a King.