Meet Mikoto Misaka, the third most powerful Level 5 esper in Academy City. Together with her best friend Kuroko Shirai and the other members of Judgment, a student-run law enforcement agency, Mikoto delves deep into the dark heart of the scientific sprawl she calls home, and uncovers secrets she wishes she hadn't! Despite Misaka's explosive confrontation with the sinister group known as ITEM, the "Sisters" cloning project marches on. The deeper Misaka digs, the less she understands. Her last hope is a deadly gambit that pits her against the Accelerator himself.