As a ninja nerd growing up I watched many ninja movies and this one was probably my favourite. Lucinda Dickey (her from Breakdance) plays a telephone engineer/aerobics instructor who is possessed by the soul of a dying ninja warrior. She picks up his powers and begins to take out the cops who shot him...her...it's complicated.
It's a Cannon film and it's full of 80s nonsense. The effects are rubbish, and the acting is bad, but the film is still very entertaining.