"The Mafu Cage" follows two sisters (played by Lee Grant and Carol Kane) who reside in a dilapidating mansion in the Hollywood Hills, built by their renowned anthropologist father. The younger sister (Kane) is mentally imbalanced, spending her days in the company of various monkeys, while the elder (Grant) attempts to live a somewhat normal life. Naturally, conflicts begin to arise.
While marketed as a horror film, "The Mafu Cage" is more of a psychological thriller with shades of horror--in truth, it is a character study, and a rife exploration of a strange, insular world crashing against "normal" society. The central plot here is a power struggle between two sisters who grew up in highly unusual circumstances, and who are unable to reconcile their circumstances with the everyday world--one of them, because she simply does not want to, and the other, because her sister is holding her back.
The film plays out with all the trappings of a Greek tragedy, and even when it goes a more salacious route, it is remarkably well-acted. Lee Grant is fantastic as the elder sister stuck between two worlds, while Carol Kane is riveting as the disturbed younger sister who cannot function outside of her deceased anthropologist father's lair of artifacts and primates. The crumbling Los Angeles mansion in which most of the film unfolds has a stark California gothic look, obviously inspired by "What Ever Happened to Baby Jane?".
Overall, "The Mafu Cage" is a potent, unusual film. It excels as a psychological thriller, largely because its lead performers are completely keyed into the material. Though not particularly pleasant, "The Mafu Cage" is disturbing and thought-provoking. 8/10.