Two beefed-up twins operating on opposing sides of the law, team up to stop a nefarious crook in this actioner. Peter Jade is a notoriously arrogant burglar who ends up with the key to an enormous underground cache of diamonds. David Jade is a cop who joins forces with Peter after greedy Philip Chamberlain, wanting the diamonds for himself, kills David's partner
Using fossilized DNA, a scientist resurrects one of nature's most fearsome predators, a sabretooth tiger. Scientific ambition turns deadly, however, when the creature escapes and begins savagely stalking its prey - the human race.
A sketch artist for the police helps a witness recall who she saw leaving the scene of a murder, and discovers that the person is his wife. Not willing to believe she was responsible, he resketches the pictures so they don't look like her, and he begins his own investigation of the murder.
