Anna, Mikuru, and Luluka head out for the day, leaving Kurea at the quiet CUREtto Detective Agency to ruminate about why she has the power of the Forgotten Race. Then, a client comes in with a calling card she got from the Phantom Thieves' Guild.

A suggestion from Anna leads the shopping arcade to hold a Halloween event. Anna and the others get dressed up in costumes and go to help out. There they meet a girl named Hinano who has been separated from her mom.

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