Save the date for a masquerade! Forget Phantom of the Opera. The Oceanside High Masked Ball has Esther and Sophie waltzing around clues to solve a cozy mystery murder by the sea. When Esther has her first actual date, she can't find a single book in the school's historic library that will help her. After Romeo and Juliette depressed her, Mr. Darcy infuriated her, and Eliza Doolittle abandoned her authentic self, Sophie dived into contemporary literature to ensure the Masked ball will be a success for these two BFFs. The school's Victorian era library is the perfect setting for a masquerade. When the girls add the dance committee to their list of responsibilities as library aids, a threat is made, and a close friend is the target. After the party is over, can Esther and Sophie unmask the murderer before it's too late? What will the girls do if their last dance is with a killer?