In Paris, Bruce and Betty are meeting with the Academy of Science, with Betty carrying one of the gold keys that opens an underground gold vault. Quasimodo, the evil great-great-great- great-great-grandson of the original hunchback of Notre Dame, spies on Betty in order to steal the gold and plans on using one of the assembled scientists to turn him into a normal human. As Betty prepares to meet with the Minister of Finance in order to secure some of the U.S. government's gold deposits, Bruce is given a vial of a chemical that reverses radiation mutation by one of the other scientists, Professor Royale. As Betty goes to her meeting, she is kidnapped and taken underground by Quasimodo. Banner follows him and soon turns into the Hulk, losing the vial in the process. Quasimodo and the Hulk battle each other within an underground dungeon while Betty escapes from her prison. The monsters' battle then takes them to the streets of Paris, where Quasimodo eventually leads the Hulk to the Eiffel
