After a young lawyer is framed for the murder of a man claiming to be a government agent, Mason must cull through witnesses to identify the killer.
In 1962, Robert Horton left the popular western Wagon Train after its fifth season. He wished to work more in musical theater. His character of Flint McCullough, the tough hero and scout of the slow moving caravan traveling from Missouri to California, was eventually replaced by another scout, Cooper Smith. The rough and stoic Smith was played by Robert Fuller.