"45 Years" is a drama that explores the complexities of a long-term marriage. The story follows Geoff and Kate Mercer as they prepare to celebrate their 45th wedding anniversary. Their lives are disrupted when Geoff receives news about the body of his former girlfriend, who died decades earlier in an accident. The film delves into themes of love, memory, and the impact of the past on the present. It highlights how unresolved emotions and hidden truths can challenge the foundation of a seemingly stable relationship, ultimately testing their bond.

In the movie "45 Years," Katya was the former girlfriend of Geoff, the main character's husband. She died in a tragic accident in the Swiss Alps fifty years prior to the events of the film, when she fell into a glacier. Her body was discovered shortly before the couple's 45th wedding anniversary, which causes Geoff to reflect on his past and the impact of Katya's memory on their marriage. Her death and the revelations surrounding it create tension and reveal underlying issues between Geoff and his wife, Kate.

At the end of "45 Years," Geoff and Kate Mercer grapple with the emotional fallout of a long-buried secret from Geoff's past. After learning about the discovery of his deceased ex-girlfriend's body, Geoff becomes increasingly distant and preoccupied. The final moments depict a tense silence between the couple, highlighting the strain on their relationship. The film concludes ambiguously, leaving viewers to ponder whether their marriage can endure the revelations and changes in their emotional landscape.

"45 Years" is a drama that follows Geoff and Kate Mercer, a couple preparing to celebrate their 45th wedding anniversary. As they finalize plans, Geoff receives a letter about the discovery of the body of his former girlfriend, who died in an accident decades earlier. This revelation stirs up unresolved feelings and tensions between them, causing Kate to confront her insecurities and the impact of Geoff's past on their relationship. As the anniversary approaches, the couple faces the fragility of their long-standing bond and the weight of memories.