In the cyber city known as "Shadow City", three years after the former killer "Raven" retired, a mysterious package broke the peace - inside were photos of the target person, including her sister who she thought was dead long ago. In order to uncover the truth, she must regain her blood-stained skills and deal with AI wanted criminals and mechanical vigilantes, only to discover that the fate of the entire movie city depends on the secret she is about to reveal.