Encouraged by her managers, rising pop star Mima takes on a recurring role on a popular TV show, when suddenly her handlers and collaborators begin turning up murdered.
In 2071, roughly fifty years after an accident with a hyperspace gateway made the Earth almost uninhabitable, humanity has colonized most of the rocky planets and moons of the Solar System. Amid a rising crime rate, the Inter Solar System Police (ISSP) set up a legalized contract system, in which registered bounty hunters, also referred to as "Cowboys", chase criminals and bring them in alive in return for a reward.
Documentary filmmaker Genya Tachibana has tracked down the legendary actress Chiyoko Fujiwara, who mysteriously vanished at the height of her career. When he presents her with a key she had lost and thought was gone forever, the filmmaker could not have imagined that it would not only unlock the long-held secrets of Chiyoko’s life... but also his own.
