On the island of Sardinia, a boy named Doppio is searching for Trish and the others on orders from Passione's boss. But Doppio has a dark secret, one that becomes apparent when he encounters Risotto of La Squadra.

Doppio, the alter ego of Passione's boss, continues to fight against Risotto and his iron controlling Metallica. Doppio struggles against the powerful assassin, but is armed with King Crimson's Epitaph, which allows him to see the future.

In the aftermath of the battle between Risotto and Doppio, Abbacchio uses Moody Blues to try and uncover the boss's identity. But the boss is adamant about keeping his identity a secret and executes his next gambit against the group.

After his death, Abbacchio was able to leave the others a copy of the boss’s face and fingerprints with Moody Blues' replay. The others try to find out who the boss is with the fingerprint and suddenly get contacted by someone. The mysterious man tells them that the boss’s name is Diavolo and tells them that the secret behind defeating him lies in the arrow. Bucciarati and the others head to Rome to meet him.

Bruno and Secco are both racing towards the man at the Colloseum whilst trying to kill each other.

Bruno unknowingly leads Doppio to the Colosseum while the rest of the gang is searching for their leader.

Everyone continues to desperately chase after the Requiem in order to obtain the Stand arrow. Diavolo's soul is then forced to show itself, but he will not quit until he obtains the arrow for himself.