Anna's identical twin, Adeline, has vanished. Everyone believes Adeline is dead but Anna Marie knows better. Gifted with a rare form of synesthesia, Anna perceives people as sounds or songs. And she can still hear Adeline's song. When Anna Marie sees her sister in the mirror holding up a newspaper, she's convinced she's lost her mind. Then she meets Jacob, a mysterious, charming stranger with old-fashioned manners--who claims to have travelled from 1865--and everything she thinks she knows about herself and her world is thrown into deeper chaos. As her search for Adeline rips Anna Marie back to mid-Civil War Missouri, only one glimmer of hope remains: her twin's song. If she has any chance of finding Adeline, Anna will have to survive the war-ravaged countryside, ruthless gangs, and a world she may never return from. Through so many hardships, can God teach her what love really is?