By the end of the 1990s, demonic power was causing frequent disasters that nearly wiped out humanity. But then a woman named Rosa appeared with unexplainable abilities and became the world's savior, effortlessly stopping catastrophic events. This angered the leader of the demons, known as Demon, who decided to activate the Tower of Babel to wipe out humanity. Rosa responded by building the Tower of Cain, and the fate of humankind was left hanging in the balance as a heated battle ensued.