A beautiful artist stumbles onto a murder just as the killer is leaving. After he levels a brutal blow to her head, she wakes up blind, and the only witness to the murder. Now in the frightening darkness, she must find her way through a dangerous world where killers stalk the innocent and cops are scarce. Two overworked, angry detectives are assigned to hunt down the killer, and to keep the witness safe.

On a class excursion to a cave with stone age paintings the clumsy Rex gets lost. A mysterious crystal opens a gateway in time and sets him back to the stone ages, where he meets a group of prehistoric fellows and the gorgeous Eba. While teaching her English and doing some pseudo-research on her fellows, his main goal is to get her sleeping with him. However the curiosity of the clan chief disturbs his attempts.

A taxi driver (Quaid) pounds Zen parables (if time money, is time the root of all evil?) into his passenger in a high-speed, idiosyncratic tour of their city's ethnic coteries. All the boy wants is to dispose of his date's dead dog and get back to the babe who's so hot she mutters darkly about being a pressure cooker.