Carly Carmine, who has been thrown off the Arcadia Movement building to her death as a result of her Duel with Sayer, has come back to life as a Dark Signer, seeking revenge. Misty Tredwell, after sensing that Carly has fully become a Dark Signer, goes to the Arcadia Movement to duel Akiza Izinski, desiring revenge of her own. Meanwhile, Jack sets out, intending to help Akiza in her duel, and not knowing that Carly had become a Dark Signer.