Fast-talking New Yorker Zoe Hart has her life all figured out until she is turned down for a prestigious fellowship she had been certain she would get. Desperate, she decides to finally accept the offer of a kindly stranger, Dr. Harley Wilkes, whom she met at her medical school graduation, and who had proposed she join his small medical practice in Bluebell, Alabama.

Zoe tries to win over residents of Bluebell by participating in the Founder's Day parade, but an unfortunate incident only makes matters worse.

Zoe enters a gumbo contest in yet another attempt to prove she can fit in as a Bluebell resident; Lavon has a crush on Zoe and Brick's new receptionist, and the news sours Lemon; and Zoe and Brick must look past their differences to save someone's life.

When a heat wave rolls through Bluebell, Zoe realizes that the hot weather is affecting everyone's behavior and lowering their inhibitions. In fact, Zoe struggles to fight her heat-induced attraction to Wade until she finally gives in. Meanwhile, Lemon is determined to win over George's parents when they come to town for a visit, but she is caught off guard when Lavon shows up to the same restaurant with his date, Didi.

Zoe discovers something shocking about the local minister and his wife, causing quite a stir among the residents of Bluebell. Lemon is determined to find the funds to renovate the town’s historic bridge that was destroyed by Hurricane Katrina, but first she is put in the extremely awkward position of having to convince Lavon to choose her proposal over so many other worthwhile submissions.