Libby finds comfort in God's love as she faces the dangers of trying to help a fugitive slave escape to freedom through the Underground Railroad.

On the Cristina's trip up the Mississippi, Libby Norstad and her friends meet a talented violinist who seems to have secret. Libby is set on discovering what it is, but when they arrive in St. Paul, his violin is stolen. Libby, Caleb, and Jordan lead the search, but find nothing. Then the fugitive slave Jordan meets his biggest enemy, and takes on a new role in the Underground Railroad.

In 1857, while working for the Underground Railroad on a Mississippi River steamboat, thirteen-year-old Libby hunts for the swindler who has robbed her father and tries to reunite the fugitive slave Jordan with his missing father.

While working for the circus that is touring Wisconsin in 1907, Kate and her stepbrother Anders uncover a mystery.

Briana O'Toole arrives in Norway to face her new life as a slave, all the while praying that God will send her brother, still in Ireland, to buy her freedom.

When her mother marries Mr. Nordstrom, Kate moves to a farm in northwest Wisconsin, solves a mystery, and learns to adjust to her new stepfamily.

Kate and Anders try to follow the guidance of God when his grandparents travel from Sweden to Wisconsin and Grandma vanishes under mysterious circumstances.

After Kate buys Windsong and Breeza, two horses with a mysterious past, someone sets the Nordstrom barn on fire and Windsong disappears.

When thirteen-year-old Kate, her stepbrother Anders, and their friend Erik go to visit Kate's blind second cousin in Red Jacket, Michigan, in 1907, they decide to try to find a long-lost map that will supposedly lead to a fortune in silver.

In the tenth century, as Devin, Keely, and Lil return to Ireland, Bree serves as Mikkel's cook on a voyage in the North Atlantic, but acts of sabotage threaten Mikkel's life and Bree's one chance of freedom.