Thomas the Terrible Tomcat has a tough life and a bad reputation. Small animals fear him and bigger ones beat him up and blinded his one eye. He lives near a garbage can behind Sully's Sammies, a small eatery. Whenever Sully sees Thomas, he brings out tasty leftover treats from his restaurant. Sully even names Thomas "the Terrible Tomcat" in the hopes that the bigger cats will leave him alone.

Sadly, Thomas is friendless and lonely. He wants a friend to have fun with, but that's hard to do since he has to act as fierce as he can so other cats will stop picking on him. One day a discouraged Thomas leaves his home and heads far into the forest to be alone. He rests behind a log when along comes Fiona, a friendly and feisty fox who keeps nudging Thomas.

Fiona wants to play, and this enthusiastic fox unexpectedly befriends the lonely tomcat. She eventually introduces Thomas to other forest friends who aren't deterred by outward appearances like the cats back by Sully's. Thomas has spent so much of his life being picked on, laughed at, and judged solely because of the way he looks, so this is a pleasant surprise. However, when danger strikes, will newly found friendships hold tight?