After inadvertently connecting to Kiyama’s mind, Mikoto learns what’s been motivating the doctor’s actions. Later, when the network goes out of control, Mikoto comes face to face with a monster!

The girls work to stop the monster before it reaches a nuclear power plant! Uiharu’s efforts slow the abomination down, but Mikoto might be the only person able to stop the creature’s rampage!

The past comes into focus as Haru'ue and Edasaki’s connection to a common Child Error facility is revealed. Later, Misaka sets out to find Kiyama after learning that the rogue scientist is out on bail and working with the Frog Doctor.

Misaka and her friends reach the facility where the children are being held, but Therestina uses Capacity Down to take the Espers out of the fight. With everything on the line, it’s up to Saten to save the day.

Haru'ue joins Saten and Uiharu on a trip to the Garden of Learning to see Misaka and Shirai, as well as to do some shopping. They later go to visit Edasaki in the hospital, where she is undergoing physical therapy, when things take an unexpected twist.

Edasaki is due to be discharged from the hospital, and it is learned that she will be living with Haru'ue. The move is bittersweet for Uiharu, who is losing her roommate, but she feels it is for the best. Meanwhile, a new movement is afoot in the city.

Shirai, Konori, Kongo and friends, and Uiharu and Saten confront the powered suits at the four Assembly sites, where they soon receive backup. Misaka and Febrie move to take on Aritomi directly, but he has one final surprise up his sleeve for them.