During the chopping down of trees in the forest, construction workers accidentally free an evil creature named Lockjaw who was imprisoned within the trees. Now Max, Virgil, and Norman must stop him from unleashing total destruction upon the earth.

A scientist who has lived in an underground environment filled with high levels of radiation for a long period of time has lost his mind and caused him to develop an immunity to the radiation. Now Virgil, Norman, and Max must stop him because he is out to seek revenge for his condition with the help of his giant radioactive scorpions by exposing the entire planet and its population to radiation.