The story unfolds twenty-five years after the events of the original film, reintroducing us to Sharon Ferris (formerly McKendrick), who now finds herself divorced and navigating the challenges of single motherhood in sunny Tampa, Florida. Her teenage daughter, Nikki, is decidedly less than thrilled about their upcoming relocation to the bustling metropolis of New York City, particularly dreading the move to an all-girls school come fall. During her summer school stint, Nikki finds herself at odds with the feisty Jessica Dintruff but fortunately strikes a friendship with the more affable Mary Grand. Mary’s father, Bill Grand, has been navigating life as a widower for four long years. In an ambitious yet comedic turn of events, the girls concoct a plan to thwart Nikki's move and encourage a spark between their parents.
Nikki and Mary cleverly craft a scheme to orchestrate an encounter between their parents. They send Sharon flowers supposedly from Bill, but the romantic fireworks they envisioned do not ignite quite as they had hoped. As a result, they summon Susan Carey (née Evers), Sharon's twin sister, who resides in California with her own family, to swoop in and help them by impersonating Sharon on a few dates to help kickstart a romance.
In a series of serendipitous events, Susan, masquerading as Sharon, encounters Bill at a local bar called the Press Box, where they ‘accidentally’ bond over a baseball game—something the real Sharon cannot stand. The next day, confusion ensues when Bill pays an unexpected visit to Sharon’s workplace, alluding to the fun they purportedly had, leaving the true Sharon puzzled and out of the loop. Susan and Bill’s interactions flourish over the coming days, but the keen-eyed maid, Florence, begins to suspect there’s more than meets the eye.
As the plot thickens, Sharon discovers her daughters’ clever ruse and spins it back on them. She enlists Brian Carey, Susan’s husband and a pilot for Trans World Airlines, to aid in her playful retaliation. While Susan and Bill enjoy a date, Sharon and Brian feign their own outing in an amusing twist, with Sharon disguised in a new look. As the evening unfolds, Susan’s focus wanes as she steals glances at her husband, resulting in a comic blunder when she declares to Bill that the man she’s watching is her spouse. In a blend of laughter and surprise, she soon finds her sister under a striking black wig, leading to a heartfelt exchange where they clarify the chaos to Bill. Sharon expresses her desire to remain friends, placing romantic notions aside.
In a joyful culmination, a going-away party is thrown for Sharon and Nikki on their boss Mr. Elias' boat. As the evening progresses, the girls execute a playful scheme, freeing the boat from the dock, much to the astonishment of the arriving guests. In a delightful twist of fate, Sharon and Bill grow closer, sharing moments filled with laughter and warmth until a kiss seals their budding connection. The narrative culminates beautifully at a wedding where Mary and Nikki become step-sisters, ensuring that Nikki can remain in Tampa, weaving together a tapestry of family, laughter, and newfound love.
