FateKey - The key to Avalon

4 years after the fifth Holy Grail War: The life of Illya, Rin, Sakura and Shirou went normally. Of course Shirou has feelings for Saber and thinks about her yet... Rin is annoyed because of this, searchs a way to contact Saber in Avalon, but for this way Shirou must deal with his lost past and change his destiny...