Dee Dee invites everyone over to her parents' house for Christmas. The Bay Area experiences a heatwave, which leads to a brownout that nearly ruins dinner. Spencer angrily declines Mona's invitation, as the holiday brings up many issues about his absent father. Mona later offers to help Spencer track down his father. Phyllis brings her new boyfriend, a Santa Claus she met at the children's hospital, but both she and Charles object when the man refuses to keep his hands off of her. Neil calls Dee Dee and asks to come over and speak with her. She believes that he wants her back, and is stunned when he instead announces plans to marry. She tries to use the heat to her advantage in an attempt to win back Neil, while Mona urges her to just move on.

Dee Dee vies with her law school rival, Stephanie Seymour, for a summer internship. Dee Dee believes that she is the more qualified candidate; but Stephanie sucks up to the man in charge, Mr. Washington. She also tries to use her sex appeal to her advantage, so Dee Dee retaliates by showing up for her final interview in a revealing outfit. She gets the job, but Mr. Washington's comments and behavior prompt her to fear that she got the job for the wrong reasons--and that her new boss might want something in return. Meanwhile, Kai develops a crush on Spencer and asks Mona to pass along this information to him. Spencer is thrilled, and decides to get involved with Kai and try to use her for career advancement. However, he panics when she starts talking about a relationship during their first date.

Kai reluctantly agrees to give a shot to Spencer's friend RJ Jackson, a talented and successful singer with a reputation for partying. Spencer has difficulty reining in RJ, and must resort to desperate measures to get a track recorded before the deadline. Meanwhile, Big Dee Dee decides to return to the stage after helping Adam prepare for an acting showcase.

In the hopes of getting closer to Phyllis, Dee Dee sets her up with her bitter divorced professor. However, the relationship soon fizzles, and the professor seeks revenge against Phyllis by turning her in for having too many cats. Phyllis blames Dee Dee, whose efforts to correct the situation only wind up making it worse.

Dee Dee and Brett run into problems with their client, a talented pitcher who won't sign his new contract because he wants to devote more time to his musical aspirations. Dee Dee asks Mona to listen to the man sing and dash his dreams of music stardom; but Delicious winds up wanting to sign him, leading to a rift between the sisters. Meanwhile, Big Dee Dee must break some bad news to Phyllis after Coco chases one of Phyllis's cats into traffic.

After finding out her rival will be writing her six-month performance review for the agency, Dee Dee makes an effort to tighten up her relationship with Brett outside the office. The two have a little too much to drink one night and wake up the next morning in Dee Dee's apartment clueless as to how they got there. Mona and Spencer trick Adam into thinking he won a sweepstakes.