FATE: The Bravest Of All

A story that follows a Master and his Servants as they fight to fix the most unusual Singularity they have ever encountered.
All the rules and strategies that Chaldea possessed have all been discarded after an unknown entity is revealed to be seeking the original Holy Grail.
The Grail is sealed away by a group of elite mages behind a magical barrier that is impenetrable by any Servant and Mage; that is until a strange boy becomes a Master and changes the game forever.