Zombie Instinct 

Molly Everett was just trying to survive all by herself during the zombie apocalypse, until she met a teenager named Kelle, who invited her to stay in the grocery store where she lived. For a short time, the two girls shared a bond, but a terrifying secret, hidden in the walk-in freezer, shatters their fragile peace. The events of that dreadful night turn Molly into an outcast, something neither zombie nor human. But she’s not alone. Kelle was also changed. Not quite zombie and not quite human, but she’s definitely insane, and she wants revenge for what Molly did to her.  

After escaping the lab, Molly heads toward her hometown and away from Kelle. Caught between two worlds, she struggles to retain the last remaining vestiges of her humanity. Inexplicably, Molly finds herself the unlikely protector of two children, who are both terrified and amazed at her abilities. Meanwhile, Kelle has gathered a horde of undead followers as she continues tracking Molly southward, killing and devouring every human they stumble across along on the way.