The story begins with Bernadette Fox navigating her canoe through the icy expanse of Antarctica, while her daughter Bee reflects on the ways life is perceived by different individuals and how her father, Elgin, has overlooked his wife’s struggles with her own contentment. Bernadette is a devoted stay-at-home mom living with her husband, a successful Microsoft developer. Elgin has created an innovative gadget called Samantha 2, designed for thought-controlled messaging. Despite their seemingly perfect family life, Bernadette feels alienated, particularly from Audrey, a neighbor played by Kristen Wiig, with whom she has a strained relationship.
A twist comes when Bee surprises her parents with a trip to Antarctica, a destination that neither of them particularly desires. Tensions rise as Bernadette struggles to connect with the local moms, culminating in a confrontation where she inadvertently humiliates Audrey. Adding to her unease, Bernadette communicates with Manjula, a personal assistant in India, who helps her with various tasks, yet this reveals broader issues related to her mental health.
Their lives are further complicated when Soo-Lin, another parent at Bee’s school, stirs the pot, making Bernadette feel even more isolated. Feelings of inadequacy bubble over as she recalls her previous successes as an architect—a field she was forced to abandon after the stress of several miscarriages and raising Bee. During a lunch with Elgin, Bernadette articulates her feelings of disconnection and uncertainty about Soo-Lin’s presence in their lives.
A fateful brunch hosted by Audrey leads to an unexpected mudslide that wreaks havoc in her home. An irate Audrey confronts Bernadette, echoing the sentiment that the other moms perceive her as a bad parent. This confrontation reaches a boiling point when Bee defiantly stands up for her mother, causing a rift that seems unbridgeable.
As mounting concerns over Bernadette's mental state arise, Elgin seeks help from Dr. Kurtz, while Bernadette reconnects with her former professor, Paul Jellenik. Their discussions reveal deep-rooted anxieties about motherhood and her abandoned dreams. An intervention spirals out of control when Bernadette discovers that her supposed assistant is a scam artist, prompting her to escape from her family in search of clarity.
In a surprising turn, Bernadette finds assistance from Audrey and sets off to Antarctica, leading to a frantic search by Elgin and Bee. Once she arrives, she integrates into a research team and befriends Becky, reigniting her passion for architecture and design. Despite initial resistance, Bernadette’s enthusiasm and past achievements win her a place in the project.
Elgin and Bee’s journey leads them to Bernadette, and upon seeing her in her element, they realize the importance of her pursuing her passion. The film concludes with the family united, watching a breathtaking sunrise over the Antarctic landscape. As the credits roll, the viewers witness the realization of Bernadette's architectural designs, solidifying her journey from confusion to fulfillment.
