Ready or Not

In a world thats overpopulated, they try to cut down the population by dividing the world. You could be a hider or a seeker.
Her whole family consists of seekers. Isa changed that.
For her whole life, she developed a plan to kill all hiders, but now she can't succeed. Isa isn't a seeker. She's not a hider either. When her best friend (and possible love interest), Angelica, becomes a hider, Isa realizes she must protect Angelica. However, when she was younger, she would always tell her little sister about her plan. What will Isa do when her sister, Elliana, follows through with the plan?