Luke Powers travels to L.A. to find that his brother has been murdered in a back alley martial arts tournament. Luke enters the tournament circuit to try to flush out his brother's killer. With the help of a trainer and former fighter, Lucke enters what he thinks will be a victorious battle.

The movie begins in Southern England in the Middle Ages and then six knights are seen riding in horses towards a destroyed town. They see the remains of burned buildings and dead people until they come upon a mother and her dead baby. She quickly dies and then a rhino-sized dragon flies overhead, the knights follow right behind, vowing to kill the creature.

A man, his business partner, and his wife are enlisted to transport an unknown object from a Russian military base, only to discover that the object is a giant, genetically-altered python.

A time-travel experiment in which a robot probe is sent from the year 2073 to the year 1973 goes terribly wrong thrusting one of the project scientists,into a plague ravaged alternate time-line whose war weary inhabitants are locked in a constant battle with killer robots from the future.