Bruce Banner, the foremost US nuclear physicist, is working for the US government, creating the G-bomb or Gamma bomb, “the most powerful weapon ever created by men.” The lab is in a secure military area in the New Mexico desert.
Banner kept the weapon’s plans a secret. This concerned Banner’s assistant, Igor Starsky, since no one could verify his work. Starsky corners Banner violently, but Banner claims he makes no mistakes, and detests those who think with their fists.
General Thaddeus Thunderbolt Ross, the officer in charge, is impatient, and pressures Banner to test the bomb, calling him a “milksop”. Betty Ross, the General’s daughter, steps in to defend Banner, which is appreciated by the scientist.
On the day of the test, Banner discovers that there is a parked vehicle near the detonation area. Asking Starsky to delay the countdown, Banner jumps on a jeep to alert the individual, Rick Jones, a teenager who sneaked in the base dared by his friends.
Banner reaches Jones on time to push him into a protective trench, but he does not make it. Starsky does not halt the countdown, the G-bomb blasts and bathes Banner with the mortal Gamma rays.
Against all expectations, Banner survives without being killed or wounded. They keep Banner and Jones in a room for observation.
At sunset, Banner feels strange. A Geiger counter (a device that measures radiation) goes wild. Suddenly, Banner suffers a metamorphosis and turns into a tall, muscular gray skin monster: The Hulk!
Jones witnesses the incredible transformation and the Hulk pushes him aside while walking through a wall as if it were made of cardboard.
A jeep accidentally hits the Hulk. The car damages, but the monster escapes into the darkness unharmed.
Jones follows the Hulk, feeling in great debt to Banner for saving his life earlier that day.
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