In 1983, off-duty policeman Reiden picks up a suspicious couple, Kei and Ai, who claim to be father and daughter but appear to be close in age. Reiden thus becomes involved in a fight between them and the female fighter K2 who is chasing them. Kei draws out his latent ability to the maximum by a Legendary "Trigger" and Ai blows away K2. The night sky splits and strange space is shown. Their enemy is the secret society "Fraud" of para-psionics, which is commanded by Kuu Ragua Lee. Kei, Ai and Reiden meet the assassins whom Fraud sends out one after another.