Mannix's routine child custody case becomes complicated when it turns out the child's father is the target of killers.
An attempt is made on the life of an altruistic doctor (Joseph Campanella); guests Burgess Meredith, Fionnula Flanagan.
Barnaby uncovers a trail of lies, deceit, and murder as he investigates the death of a real estate investor on the behalf of his grieving daughter - who is convinced it was not accidental.
Opera diva hires Mannix to find out who tried to kill her.
Barnaby investigates the death of a motorcyclist found in the desert and discovers that it may be related to another case involving the disappearance of a beautiful young woman who was set to marry a wealthy, but disreputable business man.