
"Old Christine" (Julia Louis-Dreyfus) is a divorced mom who has a handle on her career and motherhood -- and a pretty good relationship with her ex-husband -- until he introduces his new girlfriend, a younger woman, also named Christine. Old Christine lives with her son and her brother, and runs a gym, and her life is a constant struggle to keep up with everyone else.

When Christine's new boyfriend Patrick loses at tennis to her, his competitiveness streak begins to emerge.

The parent company of Christine and Barb's gym franchise informs them that they have broken a contractual clause and may lose the gym.

When Christine and Barb cannot get a loan to keep their gym franchise, they decide to transform their building into a spa.

Christine reverts to junior-high behavior when she recognizes the father of Ritchie's classmate as her former tormentor.