Tom is summoned to Sumner Group headquarters to investigate a tragedy; Jane Sumner is summoned again to Knots Landing; Mack considers giving up the Oakman investigation.

Sumner grieves over Mary Frances by taking solace in a bottle---but the mystery of her death only becomes more complicated; Harold acts drastically when he's unable to pay a debt; Val's desperate act surprises Karen.

Sumner is left more than baffled by findings that may be connected to his daughter's homicide; Harold leans on Tom for a loan; Karen picks up bad vibes from Danny at a dinner party for Val; Gary finds himself alone - again.