The sons of the great detective Fenton Hardy, Frank and Joe are eager to impress their father with their mystery solving skills.

A frontiersman and his son fight to build a new home in Texas.

After a card game, Southerner Owen Pentecost finds himself the owner of a Denver hotel. Involved with two women, he then has to make even more fundamental choices when, with the start of the Civil War, he becomes one of a Confederate minority in a strongly Unionist town.

An inexperienced female teacher is hired at a private elite school for boys where she raises a few eyebrows among the all-male faculty.

During a ride with his new pony Sinoya, the young Clay Gibson by chance finds the secret housing of the multiple murderer Tris Hatten. He reports immediately to Sheriff Adams, who strongly recommends him not to tell anybody about it. Unfortunately Clay talks to his father nevertheless. He believes Adams just wanted fame and reward for himself and accuses him in the newspaper. Thereby he endangers his son, who's now targeted by a killer which Tris' girlfriend Winnie hired for revenge. Written by Tom Zoerner

Frank and Joe Hardy are the sons of Fenton Hardy, a famous private detective. Finding everyday life at home in Bayport dull, the boys hope their father will let them work on one of his cases. Disappointed when he tells them his work is too dangerous for children, they are more determined than ever to follow in their dad's footsteps, and solve mysteries.