Mutants of Ash, Unicorn of Bones

The world changed the day that Mutants invaded. Mutants overtook humans, placed by the Mutant Queen. They placed the surviving humans on farms, for Mutants consume Human flesh to fuel their stomachs, and if it's a human they cared about, it ignites their strength.
One Mutant, named Puck, is haunted by the death and consumption of his humans friends heart, Mara, fought to pretend it didn't happen in order to live with himself. But his younger sister's time of Hunger is coming soon, and it fills him with guilt and dread, that is until he hears whispers mention another way that might save his sister's human, Chisholm, before her Hunger comes full force.
On his quest, he finds himself in a human farm where a Mutant Doctor resides along side the human's. He lives with a girl of mysterious origin, who can't speak due to a head injury that the Doctor treated when he found her.
The girl reveals her story that she remembers through sign language, including a being saved by a mutant scientist from a lab that involved experimentation. Believing that Puck's answer might be among the records, he asks for the girls help.
Where will this path take these two unlikely companions? Will they find the answers they both seek, or will the path take them even further away? What is the girl, what's her name, and where did she come from before being taken to the church? What will Puck do when he finds out the truth about the girl and his people? And, who is behind the lies, the destruction, and the experimentation that the church conducts in secret from the public?