Feng Xi, a young man who succumbed to leukemia in his past life, awakens in the Fate universe as a disciple of the Wudang Daoists, mastering the esoteric Chinese art of Thought Magecraft. Drawn by his admiration for Heroic Spirits, he travels to Fuyuki City in 1994 to witness the Fourth Holy Grail War. Upon arrival, he activates a mysterious Type-Moon Communication System, a chat group connecting him to iconic characters across the franchise, including a haughty Gilgamesh, a tsundere Rin Tohsaka, and a tragic Sakura Matou.

Unlike a typical power-granting system, this platform functions as a Q&A hub where Feng Xi presents pivotal scenes from their futures as quiz questions. As the members react to these shocking revelations, Feng Xi leverages his double-reward privilege to gain strength while subtly altering the course of history. With the dark fate of the Matou basement exposed early, the timeline begins to fracture, forcing fathers to save daughters and enemies to reconsider their alliances before the war even truly begins.