It is the end of 70s. Blue &ndash; a woman with cat ears and tail &ndash; has solved many incidents and troubles with her special ability to see a ghost and her technique to handle three guns at one using her tail.<br><br> One day, two couriers, Bill and Robert are assaulted by mysterious masked men. They don't know why they were assaulted. Blue asks a dead masked man their purpose. It is incredible. What they are aiming at is the cassette tape of Sinatra that Bill owns. Over the cassette tape, a long day begins...<br><br> (Source: AniDB)