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Inspector Cat, Detective Kun-Kun, Madam Rabbit and the rest of the gang are dishing it up at a dinner party one evening, chatting and admiring Madam Rabbit's newest gift: a gorgeous Blue Tiara! However, things take a turn for the worse when the lights go out, for Madam Rabbit's treasure is stolen! Now, Detective Kun-Kun and Inspector Cat must put on their thinking caps and catch the culprit - the mysterious Cat Thief!