A new take on the Azur Lane universe in which it tells the story of HMS Sheffield, a disillusioned and war-torn shipgirl from the Royal Navy on a mission to kill five masked men who killed her only connection with her humanity. However, as she systematically kills them one by one, she soon discovers an ancient conspiracy that spans over centuries that makes her question who she's really killing and whether or not the country she'd sworn to protect is the heroes of the story, or the villians of this tragic comedy.