Twelve-year-old Elias is sent to Mammoth Cave in Kentucky to fight a case of consumption--and ends up fighting for the lives of a secret community of escaped slaves traveling along the Underground Railroad.

1907. After tragedy leaves its mark on Rebekah Hardin's family she plans to help her parents and six siblings honor her beloved brother's memory and alleviate their poverty by working as a guide in the dangerous cave system. Kentucky's renowned Mammoth Cave presents profitable opportunities in for hardworking, capable men, but Rebekah is determined to do the job-- even if it means disguising herself. Under the wing of experienced guide Tolly Sanford,...

"Mammoth Cave, a National Park in Brownsville, Kentucky, is the world's largest cavern with more than 400 miles of cavern space. The first to explore the cave was an enslaved Black man, Stephen Bishop. With bravery and a curious mind, Bishop became a popular tour guide and mapped out the extensive caverns, all while remaining enslaved. Learn about this respected explorer's work in this inspiring graphic novel"-- Provided by publisher.