Shiki finds himself at the mercy of the infamous Phantom Thief when he is going to close the last window of his house. Shiki is about to scream and call the police when the Thief confesses to stealing everything so as to help his sick mother. Shiki was touched by his deed, and even hides him beneath some sheets and the two witness a conversation between Shiki's two step brothers: with his biological mother gone, Shiki is forced to stay in his father's house, where he's shunned as the mistress's son. The Thief makes an unexpected offer "he invites Shiki to come with him, then runs off, leaving him stunned." after hearing this.
The next day, Shiki's stepmother discovers her ring had been stolen and, naturally, blames the innocent Shiki for it. They're interrupted by Seomi, the captain of the guards, who announces he will be conducting the investigation. There's one problem, though: Seomi is none other than the Phantom Thief himself!