A young female detective named Shionko has been hunting down members of the notorious crime syndicate Climone since they killed her parents when she was just a child. After years of investigation, she finally gets a lead on their elusive leader, Marufuji. As she prepares to take him down, Marufuji discovers that Shionko has a sister, Mina, whom he kidnaps in order to force her cooperation. Meanwhile, Shionko and her team are planning a daring operation called Roller to bring down Climone once and for all. However, things take a dangerous turn when Marufuji starts playing mind games with them, threatening both Shionko's career and her family's safety. Will Shionko be able to save her sister while bringing down the criminal organization responsible for destroying her life?