Chloé is being harassed by something invisible, and Adrien and Marinette are immediately on the case. After talking with the concierge at the Le Grand Paris hotel, where Chloé lives, they discover Chloé had a fight with Sabrina, and had claimed that Sabrina is no longer her friend. Heartbroken over her words, Sabrina was akumatized by Hawk Moth, turning into the Vanisher, a completely invisible entity. As Ladybug and Cat Noir fight Vanisher, Chloé wants to join in, donning a fake Ladybug costume. However, this only causes the fight to get more difficult and Ladybug forces Chloé to leave. Only when Chloé has left the scene does Ladybug realize Chloé was right all along about where the akuma is, but despite this, she does not apologize to Chloé. Feeling betrayed by her idol, Chloé also becomes akumatized and changes into Antibug, a darker, opposite version of Ladybug.
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