An ancient plan backfired when a spell was cast during a great disaster. Ranma and the gang must come to terms with the consequences of those ancient actions as they come home to roost. If only Ranma wasn't so singularly set up for those ancient magics to bite him in the butt.

Not all of the events that determine Olympus's destiny occur in the gods' backyard. Far beyond the rule of Olympus in the realm of ninjas a forbidden halfblood holds the key to the fates of all Greeks and Romans.