厌倦了无聊生活的高中生纲岛庆太（窪田正孝 饰）和朋友相约离家出走，在路上却偶然遭遇一场离奇事件。一台巨大的工程车陷入疯狂，不断向他袭来。危急时刻，神秘男子泷本壮介（津田宽治 饰）连同其会说话走路的搭档手机老7及时出现，拯救了庆太。一番恶斗之后，工程车被成功降服，而泷本也伤重而亡。 以此为契机，关键时刻展现出过人胆识的庆太被一个名为“under ANCHOR”的神秘组织吸纳。该组织旨在防治当下频繁出现的网络高科技犯罪，手机战士则是该组织的重要组成部分。庆太和泷本的搭档老7成为朋友，并在一次次危机中成长起来……

Ai is a student at an all-girls' art high school. She is known to be extremely gifted in the arts, but the adults around her try to use her and her classmates are jealous of her. Ai suffers because of her situation, but doesn't have anywhere to escape. Her daily life becomes like a war and she begins to collapse.

1985 OVA film by Mamoru Oshii