On the planet Lemuria, intergalactic criminal Jared-Syn (Michael Preston) has become the leader of a tribe of humanoids called Nomads, who are determined to drive humans from their ancestral lands. The human ranger Dogen (Jeffrey Byron) follows him to Lemuria in order to defeat him. He teams up with Dhyana (Kelly Preston), the daughter of a miner murdered by Jared-Syn's cyborg son Baal (R. David Smith), but Dhyana is soon kidnapped and taken to Jared-Syn's lair. Dogen searches for Jared-Syn's lair with the help of washed-up soldier Rhodes (Tim Thomerson).
Metalstorm: The Destruction of Jared-Syn contains examples of:
- Arm Cannon: Baal's left arm is a retractable robotic claw that shoots green acid.
- Chroma Key: Used to insert flying machines above the landscape.
- Energy Weapon: Guns fire pulses of colored light, which usually set their targets on fire.
- Every Car Is a Pinto: The tank-like vehicles driven on Lemuria tend to explode into huge fireballs when damaged. Probably the best example is the vehicle that rolls down an incline and has just about come to a stop at the bottom when it suddenly explodes.
- False Prophet: Jared-Syn tells the Nomads he'll help them get their land back. In fact, he's just using them as footsoldiers, and plans to enslave them all once he takes over Lemuria.
- Kirk's Rock: Jared-Syn's hideout is located near the rocks.
- My Nayme Is: "Dhyana" is pronounced "Diana."
- Power Crystal: Jared-Syn hands each of his followers a red crystal, which they can use to kill people and collect their life force. The red crystals are emptied into a giant white crystal at Jared-Syn's lair, which he believes will give him the power to conquer Lemuria once it's reached full power.
- Rubber-Forehead Aliens: The Nomads have skin growing over their right eye sockets.
- Sand Worm: Deep in Nomad territory, Dogen and Rhodes are attacked by a sand-swimming snake that almost drags Rhodes underground before Dogen shoots it.
- Sean Connery Is About to Shoot You: In one scene, a character fires his weapon at the camera, causing blue light to almost fill the screen for a moment.
- You Killed My Father: Dhyana wants revenge on both Baal and Jared-Syn for her father's death.