Keita Amishima is a high school freshman who gets involved in Under ANCHOR, an organization formed to bring cyber criminals to justice using advanced technology. Taking the place of a previous Under ANCHOR agent, Keita is paired up with Phone Braver 7, a cellphone robot. Together, the two track down the high-tech criminals as well as their benefactor, the renegade Phone Braver 01. But in the process, the two learn of a conspiracy within ANCHOR itself tied to its mysterious ex-agent Magira.