In 2018, the rapid advance and development of the network technology had created the 'digital era'. Most the metropolis around the world had adapted the usage of internet network as a part of their life. From education to business, and even governing were done via internet. Even in certain countries, network centric world had been developed as the alternate of the real world. With existence of another dimension, Alternate Reality Virtual World Linker, or simply called as World Linker created to connect the digital metropolis around the world.

However, as the network world developing, network related crimes also increased drastically. Hacking and computer viruses epidemic have become network world major issues, which had worried many governments around the world. Hundreds or possibly thousands network criminals spreading around the world, ranging from lone wolf hackers to global network terrorist organization. At the top of the criminal list is a mysterious syndicate called 'Uplink', a group of incorrigible computer militants.

Concerned with the importance of the network's security, almost all governments around the world agreed to educate their people about network security. The people were taught about 'virus busting' and 'network criminal hunting'. From youngster to elder, they were taught how to deal with the network troublemakers. This also became the syllabus in education, from kindergarten to university.

Reiha, the 17-years old high school student, is just average girl. With mediocre knowledge about internet and network, she uncovered hidden truth of the internet. In this ruthless network world, she will venture into the dark side of the network world and met her match rival.