Rent is due, and Sam is coming up short on money as usual. Danny places a wager with Sam: He agrees to cover Sam's portion of the rent if Sam is able to stay in the apartment for the entire weekend (without partying, of course). If Sam loses, he has to ask Marianna for an advance on his paycheck. He also has to sign an agreement that allows Danny to put him on a budget.
Danny then attempts to get Sam to lose the bet by getting rid of all the food in the apartment—and by enticing him with women.
Linda runs into her high school sweetheart, Carl, who is now very wealthy, and she wonders what her life would have been like had they remained together. To make matters worse, Linda soon discovers that Hattie kept her and Carl apart by lying to her, and she accuses Hattie of controlling her life. Linda feels that Hattie changed her entire future by keeping her and Carl apart.
In the end, though, Carl helps Linda to see that their lives worked out for the best. And, Hattie does eventually apologize to Linda. They agree that Linda's life is exactly what it is supposed to be.
Linda has the bright idea to celebrate Hattie's 75th birthday by throwing her a surprise party. Floyd tries to warn Linda against this idea because he feels it would be too dangerous, but she goes forward with the party despite Floyd's objection.
The decorations and guests are all in place when Hattie walks through her front door and they surprise her—but she surprises everyone else when, startled, she instinctively pulls her handgun and shoots three rounds into the living room. Fortunately, no one gets hurt. Later, Hattie explains the necessity of having her pistol when Marianna objects to guns in general.
Hattie slips and falls while working late at the diner. Linda insists that Hattie go to the hospital, but Hattie refuses. Later, while Hattie is being cared for by family and friends, she begins to drive them crazy by constantly asking them to wait on her hand and foot.
Later that night when they check in on Hattie at her home, everyone is shocked when they see her bouncing down the stairs with ease. After Hattie's scheme is revealed, she falls and hurts herself for real. This time, no one will believe her!
Marianna gets Drew involved with volunteering to help mentor young mothers from a local shelter. After a luncheon at the Love Train Diner with the young mothers, Hattie discovers a baby in the bathroom. Floyd, Hattie and Linda frantically try to find the baby's mother. All ends well, though, when they find out it was all a big misunderstanding.
It's time for Hattie's annual physical, and she doesn't want to go. Linda threatens to call the IRS if she doesn't, though, which prompts Hattie to have a change of heart.
After returning from her doctor's appointment, Hattie overhears Vivian telling everyone about her horse, Old Girl, having to be put down because she has cancer—and Hattie thinks they're talking about her! Believing she's at death's door, Hattie suddenly (and shockingly) adopts nicer, kinder attitude toward her family and friends. Moved by their matriarch's good behavior, her family decides not to tell Hattie the truth until she lays out her last will and testament.