The Sonar Crystallizer, a highly powerful device capable of reducing anything to dust, is due to be tested at Gamma Base, and a villain known as the Spymaster sets his sights on it. Meanwhile, Rio tells Rick about an ancient curse that befell a prince of the Yucatan in South America. The prince was trapped in a forbidden, enchanted volcano that caused him to turn him into a green beast similar to the Hulk whenever he became angry. Eventually, a tribe magician used a secret potion was used to permanently cure the prince, and the potion was enshrined in a temple. Rick tells Banner about this legend, and Banner immediately travels to the Yucatan along with him. As Banner explores Yucatan with Rick, Spymaster infiltrates Gamma Base as a phoney General. In the Yucatan jungle, Banner's party comes under attack by the ancient tribe they were looking for, and Banner becomes the Hulk, who drives the warriors off. Bruce and Rick eventually locate the ancient temple, and after evading several boo
