A salesman from Delta Works, a London-based computerized database, offers a one month free trial that seems uninteresting until he mentions that an operator, always selected from a group of young women in their 20's nick-named "Delta Ladies", will also be supplied in the trial period. Poo arrives at the one-man Aida Detective Agency with the Delta Mazelan 'F' Series hardware. A dragon fish has been stolen by Tetsu Tobiyama and biologist Thomas Earwing seeks its return... (imdb)