Cathy (Ilona Agathe Bastian), an American student of witchcraft, travels to Bali in order to learn about Leák, the most powerful of all black magic. With the help of local man Mahendra (Yos Santo), Cathy becomes an apprentice of the Leák queen (Sofia W.D.), an ugly old hag who talks like Yoda and laughs like Salacious Crumb. But although the queen seems happy to reveal the secrets of her dark arts, she is actually using the young woman to increase her own powers, detaching Cathy's head from her body and sending it on night-time missions to collect the regenerating blood of new-born infants.
Despite featuring such bonkers sights as a flying head with vampire teeth and dangling entrails feeding on a woman about to give birth, talking fireballs engaged in mortal combat, Cathy and the queen transforming into animals (including a pig creature with breasts!!), Cathy vomiting up live mice in green goop after a night spent in the form of a snake, and a supernatural showdown with lightning bolts and electric fingers, Mystics in Bali isn't quite as enjoyable as one might imagine: the action is rather repetitive, the queen's incessant manic laughter gets really, really annoying, Mahendra's romance with Cathy is as dull as ditch-water (no gratuitous nudity here, folks!), and the visual effects are absolutely dire.
For a slightly more satisfying example of Indonesian craziness, check out The Queen of Black Magic.