A Sci-Fi classic! A desert exploration leads to an explosive discovery for Billy - his own personal laser gun. Each time he fires the laser, he begins to mutate, into an alien. Billy terrorizes the town, but it's only a matter of time before the aliens return to reclaim their weapon, and his life. With Roddy McDowall and Keenan Wynn.

Alien creatures kill a mutated alien creature in the California desert. Its remains, and the high-tech laser gun and power source accidentally left behind, are found by an ostracized teenager. However, the power source causes the teenager to mutate too, and he goes on a murderous rampage.

A teenager stumbles upon an alien weapon, which transform him into a grotesque killer.