You know you've been waiting for this movie to happen! It's happening! Grumpy Cat (voiced by Aubrey Plaza) is a lonely cat living in a mall pet shop. Because she never gets chosen by customers, she develops a sour outlook on life…until one day during the holidays, a very special 12-year-old girl named Chyrstal enters the pet store and falls in love with her after realizing she is the only person who can hear this unique cat talk.