In glamorous Paris in the 1910s, Duchessa, an elegant Siamese cat, lives a life of luxury with her owner, the wealthy widow Madame Bonfamille. However, her dream life is turned upside down when Madame decides to leave her entire fortune to her beloved felines. This does not sit well with Edgar, the house servant, who has other plans for his future. One day, he decides to kidnap Duchessa and her three adorable kittens: Toulouse, Berlioz, and Marie, and throws them far away from their home in the countryside.
Desperate to return home, the four felines encounter a colorful cast of characters, including a charming and carefree alley cat named Thomas O'Malley. With his street smarts and charisma, O'Malley becomes the protector of the lovely family as they try to find their way back to their home and the life that was taken from them.
As they journey together, Duchessa and Thomas discover the strength of friendship, the importance of family, and the true meaning of freedom. Through exciting adventures, catchy tunes, and a bit of feline humor, this story holds a heartfelt message about love and loyalty, making every cat and human who sees it feel a part of this endearing adventure through the streets of Paris.