"Amelia and Kylee, two young sisters, were found unharmed in their upstairs bedroom the night their teenage cousin Grace, who was babysitting them, vanished from the farmhouse in rural Missouri, leaving behind evidence of a violent struggle. Grace had been on the verge of escaping their dead-end town, the first in their family to go to college instead of getting married and going to work at the meatpacking plant. Her disappearance is a warning to...