One afternoon in London, an architect named Theo meets an aspiring chef named Ivy. Ivy tells Theo her dream of moving to the United States to start her own business. Inspired by her enthusiasm, Theo suggests he move with her. Ten years later, Theo and Ivy have relocated to
Mendocino, California, and are married with twin children, Hattie and Roy. They have different parenting styles as Ivy spoils the children with desserts and fun activities while Theo prioritizes their health. Having sacrificed her business plans to raise their children, Theo surprises Ivy, by giving her a piece of real estate where she can finally open her own restaurant. One night, during a severe storm, Theo's newly designed naval history museum is destroyed, just as Ivy's new restaurant receives an influx of customers seeking shelter. They include a renowned food critic who writes a positive review, resulting in Ivy's business growing rapidly. Theo loses his job due to the building's collapse and agrees to be a stay-at-home parent, while Ivy becomes the new breadwinner of the family. Taking advantage of it, he puts the children on a strict diet and imposes regular physical exercise. As a result, Ivy begins to feel shut out from her children's lives, while Theo becomes jealous of Ivy's success. Feeling a rift in their relationship, the two make several attempts to reconcile, including a romantic trip to New York City and marriage counseling, but all fail. They begin to feel resentment for each other and blame the other for their problems. As a last attempt to save their marriage, Ivy uses the profits from franchising her restaurant to give Theo an opportunity to build their dream house. Three years later, the house is complete, and 13-year-old Hattie and Roy are
prodigies accepted into a school in Miami on sports scholarships. Without the children to distract them, Ivy and Theo's frustrations turn into a feud. Ivy mocks and humiliates Theo in front of their friends during a housewarming party, discrediting his hard work. Theo, after saving a beached whale and experiencing an
epiphany, realizes he and Ivy are miserable and should divorce. He asks only for the house, but Ivy wants to leave him with nothing. Facing an impasse, they decide to make each other's lives unbearable using cruel tactics, which results in Theo being
blacklisted from architecture and Ivy's restaurants being closed for health violations. Ivy has an allergic reaction after Theo tricks her into eating a
raspberry dessert and will only cure her with an
EpiPen if Ivy signs the papers. She pretends to sign them, and he injects her with the EpiPen. Ivy then reveals the deception and Theo claims he never would have let her die. Ivy then gets their gun and threatens to shoot him. They chase each other around the house, breaking Ivy's beloved stove that belonged to
Julia Child in the process. Overwhelmed, Theo admits he still loves Ivy despite everything that has happened between them. Ivy says she feels the same and puts down the gun. As the two become intimate, a gas leak occurs due to the damage to Ivy's stove. Unaware of the situation, Theo asks their
smart home system to turn on the fire, and the screen cuts to white. ==Cast==