Our story centers around a young cat called Vincent, who teams up with Maurice the Mouse, in an attempt to try and escape the flood in an old piano. A group of sailors pick up the instrument and send it to the museum. Here, Vincent meets an elite cat squad, that has been guarding masterpieces against rodents and other vermin for years. Vincent dreams of finding a true cat family and yearns for a sense of belonging, but he doesn't want to lose his friend Maurice that saved his life, so he is forced to hide him. But his friend has a weakness - to gnaw on the most famous masterpieces.