Chapter 1: Happy Birthday Elsa

Anna's only wish has been for her sister Elsa to come out of her room and play with her. It has been 4 years since her sister locked herself away, and now it's Elsa's 12th birthday, and Anna is hopeing that her sister might finally open the door and let her come inside. The 9-year-old is more than overjoyed when the topic of a shared love of the book series warrior cats is the key.