The episode opens as a flashback to the end of season 1, beginning where Sebastian had leaned in to take Ciel's soul. However, just before he is able to feast, he is stopped by an unforeseen problem. The scene then cuts to the present, where the triplet servants continue their fight against Sebastian, in which they are defeated. Meanwhile back at the party, the ball is in full swing. Suddenly, Hannah arrives, carting a strange instrument (later called an armonica) that she plays for the guests. Though the guests are at first memorized, the tune starts to harm them physically. Outside, another fight erupts between the triplet servants and Sebastian. Hannah's music has taken control of the majority of the guests and have turned them into hostile, weapon-toting zombies. While Ranmao and Lau have corks in their ears, Agni assists Prince Soma and his friends to retain control of themselves while fending off the controlled guests. Eventually, the haunting tune reaches the outside, and after Sebastian frightens the triplet servants off for good, he rushes towards the castle with Ciel in his arms. Just as Soma is overwhelmed by the hostile crowd, Sebastian arrives to counter Hannah's melody with his own produced by water-filled glasses. As the armonica shatters, the guests are completely freed and applaud Sebastian's performance. Alois and Claude take this chance to make an entrance, and soon after, Sebastian and Claude agree to have a private conversation. On a lake, Sebastian and Claude duke it out, and during their squabble, it is revealed that Sebastian could not devour Ciel's soul because he had "become a void". It appears Claude somehow snatched Ciel's soul before Sebastian, but could not use it due to it being "incomplete." They strike up a deal afterward in which Alois Trancy will be the new target of Ciel's revenge, and form a contract by dripping their blood into the petals of two roses. Elsewhere, Elizabeth is forced into a dance with Alois, so Ciel joins the dance to get closer to her. As Ciel and Alois pass one-another, they each make a separate vow; Alois whispers "You will be mine" while Ciel promises to kill him.
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