Sheriff Will Barnaby is summoned when a member of the missing Hanson party stumbles into the mining town of Wilton, Colorado. Tommy Hanson is dazed and muttering about terrors in the valley near Wilton. The Hanson family disappeared six months prior while setting out in wagons for a new life. Will realizes he'll have to round up a posse and investigate the Hanson boy's story. With the help of his deputy and two hired guns, Will sets out to discover...