Poor Sid was getting too big for his shell, so he sets off on an adventure in search of a new one. During this time he discovers all of the shells are missing and in their place remains only garbage. Stacey Marie Johnston has created a book that is not only heartfelt and humorous but one that shows the effects of pollution on the environment. Follow Sid's journey to find a new home as he runs into a few surprise's, along with exciting and interesting encounters.