Strike Back.

A beautiful young woman and tough blackbelt fighter, Nicki Donato reaches desperation when the disappearance of her younger sister Anna shatters her family. In her search to find her sister, Nicki is thrust into an underground world of drugs, rave clubs, and a religious cult. Nicki's martial arts abilities are pushed to the limit as she infiltrates the inner core of the cult compound and attempts bring down the self-declared messiah of the cult.