A prescient and gripping novel about a brother and sister forced to fight on opposite sides of a second American civil war.

After his impeachment, the president of the United States refuses to leave office, fracturing the country.

When a UNICEF worker and a reporter discover that both sides of the conflict are using child soldiers, they set out to shine a light on something they thought could never happen in the United States.

10-year-old Hannah Miller, an orphan living in besieged Indianapolis, has joined a citizen's militia. She had nowhere else to go. And after seeing the firsthand horrors of war, she's determined to fight with the Free Women militia.

Hannah's older brother, Alex, is a soldier too. But he's loyal to the other side. After being separated from Hannah, he finds a home in a group calling themselves The Liberty Tree.

But on the battlefields of America, Hannah and Alex will fight for the only cause that matters - each other.