After Vivian's restaurant burns down and goes out of business, the Love Train Diner opens its doors to more customers. Unfortunately, they are less than satisfied with Hattie's cuisine, and business suffers.
With the diner being financially strapped, Hattie finally accepts Vivian's offer to form a partnership that will increase their revenue. Elsewhere, Danny, Sam and Drew vie for a promotion at work. When none of them get the job, they prepare for the arrival of a new boss.
Floyd and Hattie's business suffers after Vivian puts up a billboard slamming the Love Train Diner for being closed by the Board of Health. Hattie gets her revenge, though, by spray-painting vulgarities on Vivian's billboard.
When Vivian confronts Hattie about destroying her property, an argument ensues, and the entire restaurant overhears Hattie warn Vivian to be careful that her restaurant doesn't burn down.
Unfortunately for Hattie, a suspicious fire erupts at Vivian's Diner, and it burns to the ground on that same night. After being accused by everyone—including her own family—Hattie is vindicated when the fire marshal determines that it was not arson but negligence on Vivian's part that caused the blaze.
Linda has a busy day of job hunting lined up, and Hattie gives her daughter some advice on how to make a good impression for her interview.
Later, Vivian, the woman who owns a competing restaurant and the building that Floyd works for, visits the Love Train Diner and asks for Floyd's assistance. He leaves, and Hattie lets Linda, who has returned from her interview, run the diner while Hattie runs to the bank. Unfortunately, though, the health inspector pays a surprise visit to the diner, and because of Linda's negligence, he shuts down the restaurant.
Later, the health inspector returns and flirts with Linda, and with his help, Floyd and Linda are able to get the Love Train Diner back up to code and open the doors once again.
Linda shows up at Floyd's tiny studio apartment at 3 a.m. looking for a place to stay. She explains that Lionel, whom she is currently divorcing, has canceled her credit cards and that her mother, Hattie, has refused to let her in.
Floyd attempts to play peacemaker by petitioning a headstrong Hattie to help her needy daughter; however, Linda is given a dose of Hattie's tough love when Hattie physically attacks her in an effort to get her to "fight" for herself. With her blinders removed, Linda decides to stand on her own two feet.
Afterward, Hattie lets Linda move back home again—but only for three months.
As Linda grieves the loss of her marriage, Hattie encourages her, in typical Hattie fashion, to get a job, take care of herself and move on from her philandering husband.
Meanwhile, Danny accuses Sam of partying too much, and Sam asks Danny to do something about his clingy mother always being at their apartment. While Danny is submitting good work at Beagal and Steve, he ignores his mother, which leads to an unpleasant confrontation.
Ultimately, mother and son resolve their issue, and Linda agrees to give Danny some space.
Sam has had enough of Linda's visits to the bachelor pad, the last straw coming when he walks into the kitchen—completely naked—only to find her there. After Sam discovers that Danny has given Linda a key to the apartment, he confronts Danny about Linda wearing out her welcome. Sam demands that Danny get the key back. Danny is not convinced until Linda's visits cause him to miss a deadline at work. The quest to get the key back begins.
Danny begs Hattie to tell Linda, but Hattie tells Danny to get some backbone. After much coaxing, Danny passively tells Linda to give up the key.