A very expensive race horse goes missing and through Mike Bryant's (Barry Van Dyke) friendship with the horse handler is called in to investigate. This leads to him calling in the help of his old friend and criminology lecturer Jonathan (Dick Van Dyke) and it just so happens that Mike's nephew Ben (Shane Van Dyke) is staying with him so also gets involved. As they dig around they discover that several people have motive to be involved including the Brawley's who own the missing horse as they are having money difficulties.
This is an even bigger family affair with Barry Van Dyke's son joining in this tale of intrigue, a stolen horse, ransoming and intricate criminal scheme, and it's somewhat passable, though not exactly standout. It's much more routine than the other two, but well acted and has some good scenery. It didn't take many little grey cells to figure out the culprits.