A small boy, Bibi, and his father, Bobinôt, wait out a major Louisiana storm at a local store. They're worried about the third member of their family, Calixta, but can't do anything.
At home, Calixta realizes there's a storm brewing. An old boyfriend, Alcée, happens to be passing by and gets stuck at her house when the storm breaks. Calixta gets more and more worried about her family, but before she knows it she and Alcée are making out…then having sex. This totally distracts them from the storm.
When the storm passes, Alcée leaves. Bibi and Bobinôt come home and never find out he was there. Calixta seems really glad to see them.
After the storm, Alcée writes a letter to his wife, Clarisse, saying it's OK with him if she wants to stay longer on her trip. She is kind of relieved, because she could use a break from her husband and the romantic side of their relationship.
So when the storm's over, everything has worked out pretty well for everybody.