There is a new exhibit in the museum. As Alya digs deeper to find out about the Miraculouses, she sees that the symbol that is with every past Miraculous holder- that Marinette recognizes as the symbol on the Miracle Box- is also on the new exhibit. Master Fu recognizes the new exhibit as a sentimonster he accidentally created in the past which destroyed the Order of the Guardians. Worried that the sentimonster will also hurt Marinette and Adrien, Master Fu takes away their Miraculouses. Meanwhile, Mayura brings the sentimonster to life and Hawk Moth akumatizes it, increasing its proportion into "Feast". As Master Fu tries to ride on his bike away from the monster, Marinette and Adrien put on humorous costumes, proclaiming themselves "heroes" in disguise and try to get to the monster in their civilian forms on their bikes as well. Master Fu realizes his mistake in taking the Miraculouses and gives them back as he is cornered and loses his bike in the progress. Ladybug and Cat Noir defeat the monster, restoring the temple and resurrecting the monks of the Order. Now that Hawk Moth knows who the Guardian is, Master Fu leaves town, but only after letting Marinette know that she will be the next Guardian.