Forsaken

"Six years ago, Chad's hunt for a dangerous treasure turned deadly when his family home was set on fire, his parents killed. Faking his and his sister Amy's death to protect her from further retaliation, he set her up in a new life with a friend's help, letting her believe he'd died. But now the men who hired Chad to find the treasure have found him, imprisoning and torturing him to learn where it's hidden"--Amazon.com.