Sue Ellen's mother, and predatory sister, Kristin, arrive at Southfork for a visit to see baby John Ross, much to Lucy's displeasure. Digger Barnes is back in Dallas visiting Cliff and Pam, but he's not well. He's diagnosed with a genetic disease which affects the whole family. Though they know that John Ross may be Cliff's son, he and Pam decide to keep the disease a secret. Meanwhile, J.R starts to take a closer look at Sue Ellen's baby sister.

J.R can't keep his eyes off Sue-Ellen's sister, Kristin, so he gives her a job at Ewing Oil, and moves her into the Ewing condo. Pam tells Bobby about her pregnancy, but says nothing about her disease. J.R. continues to secretly finance Cliff Barnes' election campaign, and also mortgages the Southfork Ranch for his drilling project in southeast Asia.