The War of the Holy Grail and his violent consequences end. Peace seems to have settled in Seraf's virtual world. However, a new serious threat is hiding in the shadows. One day, while the servant reborn Altera and the Master walks through the capital, a group of aggressor programs appears for the first time at the end of the conflict. Threatened by a new enemy, servant Nero Claudius and her master, alongside this new ally, will have to work together to protect everything they built.