After the events of Fate/tiger colosseum UPPER Saber decides to leave and to have some peace along the way ends up helping the owner of an antique shop that gives her the gift of a mask as a form of gratitude. But it's time to go home and entering a new fight against Gilgamesh, the mask is placed on Saber by accident, Could Shirou and and his friends survive this strange night?

What happens when a scientist decides to test an invention to duplicate things in an old mask created to cause nothing but chaos and mischievous and ends up involving the heroes of Tsukihime, Kara no Kyoukai and Fate/stay night this new confusion? Read this story to find out. This event takes place after the events of Melty Blood Actress Again Current Code.