The classic story of Bruce Banner and the Hulk is told. As a young and aspiring scientist, Banner is caught in the middle of a gamma explosion, resulting in his transformations.
A bizzare story of love is told, when Bruce attempts to travel back in time to prevent his transformation. Things go wrong and he ends up in prehistoric times.
At the Gamma Base, Bruce and Betty test a new invention, the Transmat. It transports an object from one location to another. The beam transforms Bruce in to the Hulk, who volunteered as a test subject.