What would happen if you had the perfect life? Where no one dies.....Where everyone can be happy? Where there is no more Holy Grail Wars, and the Servants can be happy. Then......Why is this world....Seem so fake?

The Holy Grail War is no more, and all the Servants are living in peace with their Masters. However, when Rin Tohsaka gets a call from her Guardian, proclaiming two Servants suddenly appeared, saying they want to see Saber. When Saber realizes who they are, a new Servant suddenly appears proclaiming she is stronger than Saber, and the rest of the Servants. With her comrades, the new Servant challenges everyone to a Holy Grail War. Will the Servants and their Masters accept her offer and if so...Are they prepared for what the new Servant has in store?

Gilgamesh considers Saber as his, and his alone, so all hell breaks lose when the ever-so-charming Lancer attempted to charm his way through Saber's Heart.