Thirteen-year-old Zinnia Taylor uncovers family secrets and self truths while clearing a mysterious settler trail that begins on her family's farm in Kentucky.

After their parents are declared dead, Leo and his brother Hollis are taken in by a wealthy but distant step-uncle, and when, on his thirteenth birthday, Leo acquires the ability to hear sounds from the past when touching certain objects, he tries to use the skill to rescue a dolphin, whatever the cost.