When the moon dyes the old cobblestones silver, a rumor begins to circulate through the city.

Every time the night's curtain falls, a mysterious cat appears from nowhere, deftly stealing only jewels, gold coins, and treasures cherished even by royalty and nobles. No one can ever catch a glimpse of it; all that remains are small paw prints and the sound of a bell chiming in the wind.

With a mix of awe and affection, the people called this legendary thief – the "Legendary Phantom Cat Burglar."

In the walled trading city, the protagonist, who runs a small tailor shop, had also been troubled by its thefts many times. The rare silk used for meticulously crafted garments, the ornaments meant for the royal family, the expensive threads and jewels... come the morning after a moonlit night, they would vanish without a trace.