Jack and Matt use the Imagination Station to travel back in time again to the pre-Civil War South, where they plan to carry out their promise to help two slaves escape through the Underground Railroad.
Two eleven-year-old boys discover the Imagination Station which takes them back in time to pre-Civil War Odyssey where they encounter slave traders and the Underground Railroad.
Mark's curiosity leads him into trouble when he stays with Mr. Whittaker, the owner of Whit's End, while his mother is in Washington, D.C., trying to work out her differences with Mark's father.
Ten-year-old Jimmy Barclay thinks his life will be much better after he says "yes" to Jesus, so when he loses his best friend and his grandmother dies, Jimmy wonders if becoming a Christian was the right thing to do.
When Patti wins a stuffed bear at Odyssey's spring carnival, a series of strange events lead to a mystery and reunite her with her friend Mark who now lives in Washington, D.C.
Taking another trip in the Imagination Station, Mark assists the valiant knight Sir Owwen in his quest for the Ring of Uther and comes to understand God's eternal plan.
A homeless man's arrival in Odyssey challenges Whit and the young people of the community to consider what it means to live as Christians in difficult situations.
To impress the members of a special boys' club he longs to join, Mark betrays a secret of his best friend Patti, causing him to lose her friendship and his club membership.