A daughter who studied abroad was assassinated on her first day back home, and a newspaper owner in a wheelchair actually used the gears of his pocket watch to kill someone. When her father's arms list discovers Japanese secrets, she is forced to fall into the underground intelligence lair with the mysterious man, only to find that the recording of her mother's participation in the 731 experiment is locked in the cherry blossom brooch - and his heartbeat is exactly the same as that of the boy who sank into the river thirteen years ago.
