Home, at last, in the isolated underwater city of Elysium, Evie has finally found her true self hidden under layers and layers of false memories implanted by the woman she knew as Mother. Thanks to the intervention of her father, she knows the horrible truth about Mother and her insidious plans for the city. With the help of the love of her life, Gavin, and her best friend, Asher St. James, Evie is determined to free her people from the cruel dictatorship of Mother's laws. But how do you free people who don't know they need rescuing? Working with the growing Underground rebellion, Evie tries to remove Mother from her position by force--with disastrous results. As the body count rises, Evie must find a way to save Elysium before Mother destroys them all.