David is employed at a scientific firm known as the Joshua-Lambert Institute. He is also happily involved with a colleague named Dr. Maggie Shaw. Two years have passed since his last transformation into the Hulk, and he hopes to rid himself of his alter-ego for good with the Gamma transponder he has created. But before David could be cured of his affliction, a former student of his by the name of Donald Blake makes a surprise visit. Blake, who has discovered that David Banner is still alive, explains to David about his bond with a Viking god named Thor. He calls upon Thor to prove his claim, but unfortunately, things get out of control, and Thor provokes David's transformation into the Hulk. A fight between the Hulk and Thor ensues, leaving the laboratory damaged. To make matters even worse, David and his transponder are soon at risk, thanks to a gang of criminals associated with the Joshua-Lambert Institute.