In 1864 Japan, a young woman named Chizuru Yukimura is searching for her missing father, Koudou, a doctor by trade whose work often takes him far from home. But with no word from him in months, Chizuru disguises herself as a man and heads to Kyoto in search of him. Attracting the attention of ronin, she tries to hide and ends up witnessing a horrifying sight: the ronin being brutally murdered by crazed white-haired men. In a startling turn of events, members of the Shinsengumi arrive to dispatch the creatures. But Chizuru's safety doesn't last long, as this group of men tie her up and take her back to their headquarters, unsure of whether to let her live or silence her permanently. However, once she reveals the name of her father, the Shinsengumi decide to keep her safe, as they too have been searching for him. But Koudou is more connected to the Shinsengumi than they let on, and soon Chizuru finds herself embroiled in a conflict between the Shinsengumi and their enemies, as well as political tension in Kyoto. In 1860's Edo, Japan, 16-year-old Chizuru Yukimura lives a simple life as the daughter of a doctor. When her father's work takes him away from home and into the capital of Kyoto, Chizuru is left alone with only the letters from her father as a means to stay in contact with him. After the letters stop coming though, Chizuru becomes gravely concerned. Disguising herself as a man for safety, she travels to Kyoto to find him, only to find herself being attacked by a group of samurai and a strange, almost inhuman man. Chizuru is saved by a mysterious member of a group known as the Shinsengumi, but because of what she witnessed, she's taken back to their base of operations to be interrogated and possibly silenced…forever.