Lucas joins a posse after the Cattleman's Association is robbed of $3,000. Meanwhile Mark goes fishing at a nearby creek. The posse finds the robbers and Lucas wings one of them and his horse bolts. Mark finds the horse and takes him home. When Lucas returns he finds the stolen money and takes it to the sheriff. After he leaves the robbers come by looking for a horse and Mark stalls them until Lucas returns.
This issue reprinted in TV Western Heroes: Volume 1.