Academy City is a bustling metropolis brimming with ambitious students and groundbreaking scientific achievements. Among the exceptional esper development program is Mikoto Misaka, bestowed with the moniker "The Railgun." Mikoto, ranked third among the formidable "Level 5" espers, is gifted with the unique ability to manipulate electricity. However, the discovery of strange occurrences within the city compels Mikoto to investigate the rumored ramifications of the "Level Upper," a device that allegedly amplifies an esper's level. As the situation spirals out of control, it becomes clear that Academy City's pristine façade may conceal a sinister reality. Toaru Kagaku no Railgun follows Mikoto and her comrades as they navigate perilous predicaments and unravel the mysteries surrounding the Level Upper. As Mikoto aptly puts it, "This city always has something up its sleeve."