To defeat the legendary O-Part Mexis, Jio was forced to make a dangerous pact with the evil spirit that dwells deep within his heart. Now that the time has come to resume his battle with the man responsible for shattering his old O-Part--Wise Yury, the Crimson Magician--will Jio's newfound strength aid him in stopping this powerful O.P.T., or will his eternal soul be lost in the process?

After destroying Miko's robot body, Jio reunites with Ruby. They join with Ball and their other friends to search for the headquarters of the Zenom Syndicate, which has been making progress in capturing the Demons of the Reverse Kabbalah. However, little do they realize how all-consuming their search will become!

Jio's friend Ball always dreamed of being strong--strong enough to help the resistance movement stop the maniacal governor Jaga who has a stranglehold on his hometown, and strong enough to defend his friends and his sister. Now that he too is an O.P.T., it looks like Ball might stand a chance! Can he, a novice when it comes to O-Parts, defeat a powerful member of the Zenom syndicate single-handed?

Jio and his new friend Ball, a member of the resistance group fighting against the corrupt Governor Jaga, are in deep trouble. They've successfully broken into Jaga's lair, but are they strong enough to survive a battle with the notorious criminal Wise Yury? Later, Ruby learns more about her father and the secret origin of the pendant he gave her before his mysterious disappearance. Could Ruby's seemingly unimpressive trinket actually be one of the most powerful O-Parts of all?!

The Olympia tournament has begun, and Jio is ready to do battle in the preliminary rounds! But his opponent Anna has some wily tricks up her sleeve...as does Ikaros, the leader of Rock Bird! The action heats up when the tournament moves to a spherical arena where participants can fight in zero gravity! Along the way, Jio meets some more of his fellow contestants, including the steadfast Kite and his ailing friend Yuria. Can Jio win the tournament and help his newfound friends?

His prized O-Part now busted in two, Jio and Ball strike out to locate the only man who can help them: the mysterious and reclusive O-Parts appraiser Kirin. But when they arrive at Kirin's abode, a cotton candy-like canine greets them instead. Is Kirin, a being so feared for his strength that even the Stea government won't bother him, in fact just a puffy pooch? And will Jio and Ruby everbe reunited?

Killua and Biscuit take on two Bombers in a fisticuff competition, and during the fight, Biscuit reveals her true shocking form! Meanwhile, Gon is set on getting revenge on Genthru no matter what the cost--including his own body parts! Afterwards a strange event is triggered due to Gon having 99 cards--it's a multiple-choice quiz! But just what is the quiz about, and more importantly what can the prize possibly be?!