In a near‑future world where Headmeters, people with psychic abilities whose power is displayed on their foreheads during combat, rule society, a tense escape begins. Kei and the little girl Ai flee for their lives. Ai carries a terrible secret that could shatter the current world. Kei, a former experimental subject, never exceeded level five in power, a stark contrast to others who easily surpass his abilities. Yet, in moments of desperation, he can raise his power to infinite when Ai is threatened. Pursuers of Ai are guided by a hidden agenda and assisted by a small, dwarf‑like man who resides in a robotic suit. After Ai is eventually captured, Kei takes on the role of a detective, reminiscent of Sherlock Holmes, to uncover the truth.