Caveman taps into Romulus' chaotic state of mind, where overwhelming delusions are barely distinguishable from reality. But the police aren't interested in investigating the crime, so Romulus takes on the case himself. One may think that a homeless schizophrenic wouldn't make a good detective, but it turns out that Romulus is a secret genius and a Julliard-trained musician. Jackson, who gives a strong, sympathetic performance that holds the film together, unfortunately also overshadows it.
Caveman is intriguing, visually stunning, and evocative, but emotionally hollow too.