This is an older edition which has been updated to: https://www.goodreads.com/book/show/4... The world has changed. Scientists warned it would happen. Meteors devastated the Earth. World Governments developed plans to help surviving citizens. The United States disbanded and salvageable land was divided into four quadrants—North, South, East, and West—governed by The Remnant Council. Struggling to survive, seventeen-year-old Ava ends up in juvenile detention, until she is selected for a new life—with a catch. She must be injected with an experimental serum. The results will be life changing. The serum will make her better. To receive the serum Ava agrees to join a program controlled by ISAN, the International Sensory Assassin Network. While on a mission, she is abducted by a rebel group led by Rhett and told that not only does she have a history with him, but her entire past is a lie perpetuated by ISAN to ensure her compliance. Unsure of who to trust, Ava must decide if her strangely familiar and handsome captor is her enemy or her savior—and time is running out.

Alliances are forming. The resistance is growing. Everything is about to change. With her memory still fragmented, Ava returns to the International Sensory Assassin Network (ISAN) to find the twin sister she never knew she had. But as Ava hunts for information, she finds herself tangled in a web of yet more lies and conspiracy. The Helix serum may not be required to access her superpowers, and the number of male assassins—previously considered too volatile to tolerate Helix—is growing in every territory. The more Ava uncovers, the more of a threat she becomes to ISAN. Her only salvation may be to join the rebels—if she isn’t killed first.

ALLEGIANCES WILL BE TESTED. IDENTITIES WILL BE REVEALED. NO ONE IS SAFE. While searching for the HelixB88 anti-serum on the black market, Ava uncovers valuable intel that may help the rebels in their fight to bring down ISAN—the location of a hidden facility. But first, the insurgents must find the female citizens unexpectedly displaying powers without use of the Helix serum before ISAN captures them. As the rebels join forces with other sectors, ISAN plans their destruction by using someone they don’t suspect at the rebel home base. A traitor within. Now, Ava must make a dangerous decision, one that could risk their capture—or worse.

Behind enemy lines, new soldiers will emerge, and unexpected heroes will rise. Ava is a prisoner. And she is not the only rebel held hostage at ISAN's secret compound. As she plans an escape, the lives of the rebel prisoners are in her hands, along with those she thought were dead. Rhett and his team desperately search for Ava while one of the Remnant Council joins forces with another network looking for the creator of the Helix serum. And time is running out. Mr. Novak has been secretly creating an army called CODE, and what he plans for Ava will mean a permanent end to the rebels—and her.