Here is book 2.
It's been 6 years since Kai's grief over his sister has increased, and the revenge on the TPD has grown ever since the sectors fell apart, destroyed by the new Government leader Damien Turner, now determined to banish all of the Sectors and start fresh. Kai was cast away in a secret place build underneath the society floors. He meets a clan called the Rats where they work on the lights and machines for the cities above, unaware of the history of the Sectors and the cruel actions of the TPD. The Rats were often brainwashed by them. Kai must build a rebellion and kill Damien Turner but how can he if he's blind?
He soon discovers the society below isn't the same. The emotional root of all conflict, schooling, and feelings are prohibited. A life without emotions.
Everything can change if one emotionless girl steps up to help Kai change the life underground and the lives of others.