The film which is based on the ongoing same-titled manga by Miyatsuki Arata and Kanzaki Yuuya, features Matsuzaka as Usobuki Tadashi who is a mysterious man with red eyes, wears black suits with a wine-red shirt and possesses a special power which will drive people to their death through methods such as curses and brainwashing. However, it is impossible for his crimes to be proven in court thus Usobuki cannot be taken to justice for the killings he did on behalf of his clients.
Sawajiri plays the role of Tada Tomoko who is a police detective and the only person who cannot be controlled by Usobuki. She is the number one beauty in the police station who hates lies and beating around the bush. Although she may speak harshly, she's actually very caring towards her subordinates and even the criminals. In the original manga, this character is actually a man but it was decided to change this to a female instead so as to contrast against the evil and bewitching Usobuki.
Although this is the first time that Sawajiri is taking on action scenes and fighting against men on screen, she revealed that she had always wanted to give such scenes a try someday. As her character is modeled after a man after all, she tried to show the masculine side of her character especially her strong sense of justice and will. With regard to acting against Matsuzaka, she praised her co-star for bearing a striking resemblance to the character in the manga, she said that she had enjoyed herself thoroughly during the filming of this movie.
Sources: Sponichi / My Navi News / Eiga.com