Rin struggles to survive in the Uchiha clan as a time traveler. In order to resist the countdown crisis, he must practice the secret technique of thunder and fire under the guidance of Shisui, and at the same time deal with the surveillance of Konoha's top brass and the invasion of Anbu. As the conspiracy within the clan emerges, he gradually discovers that the "Flame Heart Art" given by Shisui contains a taboo that subverts the blood inheritance, and Itachi's stance and the plan to exterminate the clan have also become fatal variables. Faced with a life and death decision, his original thunder and fire ninjutsu and awakened Sharingan will shake the gears of destiny of the entire ninja world.
