In the city, there is barely any room for social interaction. Every cat is fighting for every scrap of food, for every ray of warmth, for every day to still be alive. Cats are cautious and malicious, hostile and scared. But, despite all odds, a cold-hearted, stubborn cat with her naive little sister and a tag-along tomcat embark on a long and hard journey through the busy city on a long, tough journey to survive.