For the first time in the UK, a Blu-ray version of Nishimura s cult splatterfest, packed with extras. Set in a future Tokyo where the police have been privatized, this is the story of samurai-sword-wielding Ruka and her mission to avenge her father's assassination. Ruka is a cop from a squad whose mission is to destroy homicidal mutant humans known as "engineers" possessing the ability to transform any injury to a weapon in and of itself.