Identical twin sisters Charlie and Cass Goodwin lead very different lives. Charlie co-hosts a reality baking show called
Sweet & Salty in Los Angeles alongside Austin Nash, her nemesis from culinary school. Cass runs Woodburn Breads, the family bakery in the small mountain town of Starlight Peak, while their parents, Thomas and Helen Goodwin, vacation in Cabo. Both sisters are at a crossroads: Charlie is competing against Austin for the sole hosting spot on a prestigious new show called
Bake My Day, and Cass has been stalling on a marriage proposal from Brett Linklater, her long-term boyfriend.
When a shelving unit collapses on Charlie during taping, she suffers a concussion that strips away her senses of taste and smell. That same evening, Cass finally tells Brett their relationship is over, but he refuses to accept the breakup. Desperate, Charlie calls Cass with a proposal: They will swap lives. Cass will impersonate Charlie on set while Charlie runs the bakery and handles Brett. Cass, eager to escape the pressure of small-town life, agrees. They meet at a gas station the next morning and exchange cars and identities.
Cass's first days on the
Sweet & Salty set are rocky. She arrives late, stumbles over scripted lines, and contends with Austin's condescending behavior. She notices the unfairness of Charlie's working conditions: While Austin wears professional chef's whites, Charlie is dressed in revealing gowns and stilettos. Charlie also forgets to send Cass the recipe file, forcing her to improvise. Cass barely salvages one taping with a hastily devised Aperol Spritz cupcake. When Austin steals her next idea by having his assistant spy on her workstation, she draws inspiration from Miguel Rodriguez, the physician assistant who treated Charlie's concussion, and creates a sticky toffee date square pudding that impresses Sasha Torres, the show's formidable producer.
In Starlight Peak, Charlie struggles equally. She falls asleep and burns three batches of sourdough, triggering a visit from the fire department. There she meets Jake Greenman, Faye Christie's grandson and a new firefighter in town, whose good looks and gentle competence immediately unsettle her. Brett keeps showing up at the bakery, refusing to acknowledge the breakup, and Charlie finds his persistence maddening but cannot confront him without blowing her cover.
Both twins begin falling for someone new. Cass meets Miguel outside a coffee shop and invites him to a taping, thrilled to discover his plus-one is his sister Jacintha, not a wife. They share a romantic dinner at Fabrizio's, a neighborhood Italian restaurant, and their first kiss outside Charlie's apartment. Meanwhile, Charlie and Jake grow closer through a series of encounters: He catches her when she nearly faints, photographs the bakery for a new website, and rescues Cass's cat from a tree. Their first real kiss happens during a bread-proofing lesson, and Charlie's returning sense of smell floods her with the scent and taste of him.
Charlie's senses recover, but she is not ready to leave Starlight Peak, and Cass is not ready to face Brett. The twins agree to switch back on Christmas Eve. Miguel arrives at Charlie's apartment with a surprise dinner, and he and Cass test a sugarplum layer cake together. When Cass's unfamiliarity with the apartment raises Miguel's suspicions, he attributes her lapses to worsening concussion symptoms and insists she stop working. Unable to reveal the truth, Cass tells him they need to stop seeing each other. Meanwhile, Charlie and Jake share a slow dance and a passionate kiss at a wedding, their feelings undeniable.
The deceptions begin to unravel. Charlie inadvertently livestreams a furious argument with Brett on Live.Li, a livestreaming platform that Walter Demetre, the bakery's teenage assistant, has set up. She calls Starlight Peak "small" and "predictable," triggering a town-wide boycott of the bakery. She also discovers she may have accidentally contaminated the generations-old sourdough starter, threatening the supply of Starlight Bread, the fruit-studded sourdough holiday loaf that every household receives at the annual Christmas Eve celebration.
In L.A., Cass overhears Austin and Sasha in the greenroom and learns that Austin was given the
Bake My Day job weeks ago, before the holiday special even began. The decision was not Sasha's. The next morning, Cass calls Sasha pretending to be Charlie, delivers an impassioned speech about the unfairness of Charlie's treatment, and quits. She then tells Miguel the truth: She is Cass, not Charlie. Miguel is speechless. Cass kisses him goodbye, gets a permanent Gemini constellation tattoo, and drives home to Starlight Peak.
The twins' reunion at the bakery is bitter. Cass reveals Charlie was never going to get the hosting job; Charlie accuses Cass of ruining her career. Cass fires back that Charlie never considered what she left behind when she moved to L.A., leaving Cass to shoulder the family legacy alone. They discover the starter is failing and part for the night without resolution.
The next day, Cass tackles her problems. She visits Brett and they agree to a genuine friendship. She asks Sharon Marston, a local divorcée who maintains her own sourdough starter, to donate some to replace the failing culture. Sharon agrees in exchange for a display for her dog biscuit company, Top Dog. Over coffee with Faye, who reveals she has known about the swap all along, Cass receives counsel to let things run their course. But on a solo hike, Cass is caught in a sudden blizzard, hits her head on a tree stump, and loses consciousness.
Charlie feels a sharp phantom pain in her temple, the twins' lifelong empathic bond signaling the injury. Cass manages a brief phone call before the line goes dead. Charlie races to the fire station and confesses the entire swap to Jake. Before he can process the revelation, the urgency of the situation takes over. Miguel, who has driven through the blizzard from L.A., arrives just in time to join the search. The three of them hike into the storm and find Cass unconscious with a bleeding head wound. Miguel stabilizes her, and she regains consciousness to find him at her side.
At the hospital, the twins reconcile. Cass shows Charlie her new tattoo and tells her she is too talented to step away from her career. Meanwhile, Walter, Jake, and Miguel bake the remaining Starlight loaves in an all-night marathon that Walter broadcasts on Live.Li, attracting 30,000 viewers. Charlie joins the stream and realizes she loves being on camera with people she genuinely cares about. Sasha, watching from L.A., calls and proposes producing a new show set at Woodburn Breads. Charlie agrees on the condition that she serve as executive producer with casting approval. She tells Sasha the truth about the swap, and Sasha laughs. Outside afterward, Jake tells Charlie he fell for the real her, regardless of the name she used.
At the Starlight Eve party, Sharon and Brett reveal they have purchased the building a rival bakery chain wanted, blocking it from entering town. Thomas and Helen announce they are ready to let Cass take over the bakery. One year later, on Christmas Day, Charlie and Jake live in the Victorian house Brett once bought. Cass and Miguel live together in Starlight Peak. Austin's career has collapsed after his memoir was exposed as partly plagiarized, and
Bake My Day has been canceled. The twins co-star in a successful baking show called
Sugar Twins. Faye, ordained online, presides over a surprise wedding for Cass and Miguel. Jake gives Charlie a rescue puppy, and Charlie reveals she is pregnant by giving Jake a dog biscuit inscribed with "Big Sister." The house fills with celebration as snow falls softly outside.