Carly and Sam Mack have looked out for each other ever since their mother left their family when they were very small. Sam is an aspiring musician entering college. Carly is in her last year at the school, wanting to remain the supportive sister she has always been able to be, but as Sam enters the world of higher education, he discovers that his sister's life and his own life has always been more complicated than he ever imagined. Enormous is a story about the adventure of growth, interpersonal relationships, the past, and future. It is a character-heavy and emotional story, with the characters' witticisms and worldviews laced throughout.