Ingrid, a successful author, faces a life-altering moment when she learns that her former coworker and friend, Martha, is battling terminal cancer. Their journey begins anew at the hospital where Martha is receiving treatment, and there she opens up to Ingrid, sharing her poignant life story.
In the 1970s, Martha's life took a dramatic turn when she became pregnant by Fred, a young man she met during her college years. Fred, however, left to serve in the Vietnam War and returned profoundly changed by PTSD. After some time, he abandoned Martha and married someone else, leaving behind their daughter, Michelle. As Michelle grew up, she often questioned her mother about Fred's whereabouts, which ultimately led to feelings of resentment and estrangement between them. In a desperate attempt to provide some closure, Martha reached out to Fred's new wife, who explained a tragic twist: Fred had died trying to save someone who never existed, a victim of his own troubled mind during a hallucination.
Now, in her final days, Martha confides in Ingrid that she has procured euthanasia pills, contemplating a quiet end to her life. Ingrid finds herself torn between emotions but finally agrees to accompany Martha during her last moments at her serene country home. Martha sets a haunting condition for Ingrid: she will know of Martha's passing when she finds the bedroom door closed the next morning.
The following day, Ingrid wakes up, only to discover that the door is indeed shut, leading her to believe Martha has gone. However, her heart sinks when she sees Martha still alive, revealing that the closed door was merely a test to prepare Ingrid for the inevitable. During a lunch with Damian, a fellow writer who had once shared a romantic connection with both women, Ingrid reflects on the heavy weight of the situation.
Tragedy strikes when Ingrid returns home to find Martha lifeless on a lawn chair outside, with the ominous door closed. Discovering a note from Martha expressing gratitude and urging Ingrid to reach out to Michelle deepens the connection between the two. Ingrid soon contacts authorities, only to face skepticism about her ignorance of Martha's intentions. It becomes evident that Martha had contemplated this path long before reaching out to Ingrid.
Determined to bridge the gap, Ingrid eventually tracks down Michelle, inviting her to Martha's tranquil country dwelling. The two women, united in grief and understanding, share a moment of solace as they lie together on the lawn chairs while snow gently falls around them, creating a poignant backdrop to their shared loss.