Walnuts The Movie (1970)

Wayward actor, Jerry Stax is whisked away by concerned pal, Terry Ruggles, to a remote locale in deep Americana, where an enigmatic "Doctor" runs an extraordinary clinic for creative rejuvenation. While there, Jerry navigates his way through the various stimuli of the other curious "participants" and seemingly inexplicable methods of Dr. Buck. Soon enough, outside forces threaten the sanctity of Buck's operation, as strange familial ties and unquiet minds unravel.