September

After her suicide attempt, Lane moves to a country house in Vermont to recuperate. She hopes for a quiet summer away from her husband and city life. Her best friend Stephanie comes to join her for the season.

Stephanie arrives to spend the summer with Lane and to take a break from her husband. The two women settle into the routine of country living and share their hopes and fears. The stage is set for the competing emotions that thread through the house.

Lane's brassy mother Diane and her physicist husband Lloyd move into the house, changing the dynamic. Lane's past and the mouth of gossip reappear as Diane wants to control her narrative. The presence of the stepfather adds tension.

Lane becomes close to two neighbors: Peter, a struggling writer, and Howard, a French teacher. Howard loves Lane, Lane loves Peter, and Peter loves Stephanie, setting up a complicated web of affection. The house becomes a crossroads for romance and longing.

Diane wants Peter to write her biography, partly to revive her own fame. Peter sees a marketable story in Lane's past—the teenage shooting of Lane's mother's abusive lover. Lane resents the potential spotlight and tries to keep that memory hidden.

Diane hosts a party that upends Lane's plans with Peter. Peter arrives early and confesses he has wanted to be alone with Stephanie for a long time. A thunderstorm cuts the lights; candles and piano music create a romantic mood; Howard pours out his feelings for Lane.

After the mood shifts, Peter tells Lane that he does not share her feelings. Lane processes the rejection and tries to maintain her composure. The night leaves a disturbed undercurrent among the guests and the house.

Peter attempts to seduce Stephanie, creating further tension. Stephanie is torn and ultimately follows him to his house, hinting at a concealed attraction. Lane's sense of betrayal deepens as the romantic triangles tighten.

The next morning, a real estate agent shows the house to a prospective couple. Lane focuses on the sale money to move back to New York, but her mood is darkened by Peter's rejection.

Peter arrives as prospective buyers tour the room and kisses Stephanie, shocking Lane. Stephanie insists the kiss meant nothing, while Peter reveals that he and Stephanie have deeper feelings. Lane's world becomes more tangled as truth and denial collide.

Diane reveals that she and Lloyd will move into the house permanently. Lane insists that Diane gave her the property long ago, but Diane dismisses it as a drunken whim. Lane has a breakdown, accusing her mother of being fake and insensitive.

In a climactic moment, Lane cries out the line, 'You're the one who pulled the trigger!' revealing that Diane was the shooter of the abusive lover. Lane explains that the lawyers had her say what they wanted to ensure leniency for her. Diane's deception is laid bare, leaving Lane traumatized.

Diane finally concedes that if given a chance, she would have behaved differently. The revelation redefines the family dynamics and the cost of secrets. Lane's world has been irreparably altered by the truth.

Everyone leaves except Stephanie and Lane. Stephanie encourages Lane to move on and keep busy, signaling a cautious path forward. The film ends on a note of cautious resilience and the possibility of healing.