What is the fine-grained topic of the following text: Devoted to reviving the mystique of the ninja (even imbuing them with slightly-supernatural abilities), this film has plenty of dull dialogue and very few surprises in showcasing all the permutations that fans could ask for: Ninja-vs-criminals, ninja-vs-SWAT-team and the ever-popular ninja-vs-ninja. Only return the topic.
Review of a ninja-themed film