Plot
Lily and Paul invite their three-generation family to their rural lakeside home over a weekend. Anna and her partner Chris arrive late, and it soon becomes apparent that she is estranged.
Trying to connect with her sister, Jennifer helps Anna in her room, asking her why she hasn't responded to various family events. Chris has to be introduced around as everyone doesn't know her. Jennifer asks Anna about dancing, which she has quit, she then lists all the other pursuits she's quit like acupuncture, quilting and yoga which their parents have paid for. Anna also is critical of Jennifer's husband Michael, and likewise Jennifer disapproves of Anna bringing her on and off again Chris and of Lily's long-time friend Liz's presence.
Everyone is there to say goodbye to Lily, who suffers from an incurable disease, and with the help of her husband Paul has chosen to pursue euthanasia when the weekend is over. In the meantime, they do crossword puzzles, play charades, etc.
The next morning, the grandson Jon asks his grandfather how they will euthanise Lily. As euthanasia is illegal in the state, although in reality Paul is going to give her the lethal dose, he's going to tell them on the 911 emergency phone line that she must have taken it while he was on a walk. Although Jon sees her as still okay, Paul explains that Lily is very likely go downhill fast, so she must do it while her arm still works.
At breakfast, although it is summer, Lily suggests they do an early Christmas, assigning different people tasks. First, they all go for a walk, and she shows them where Jennifer was conceived, hence why she and Paul ended up buying the land and building the house there. When Anna asks, her conception story is ordinary.
As her end approaches, their mother's decision becomes more and more difficult to handle for her daughters Jennifer and Anna. Anna tells Chris she is going to call 911 to prevent the procedure, who isn't too supportive of this. In the kitchen, as they're preparing the meal, Jen finds the pentobarbital.
As Jon hangs the ornaments for Lily, he asks for life advice, which she attests elders are no wiser. When she presses for him to tell her his hidden desire, he admits he'd like to become an actor.
Over dinner, Lily gives each of them a piece of jewelry important to her, as well as a novelty tie for Michael and a dildo for Jen. Jon's parents show how controlling they are of him, disapproving when he says he wants to be an actor, he is offered wine and Lily pulls out pot.
When Lily proudly talks about each of them, after she declares she raised two strong, independent women, Anna declares they're both messed up and that she herself had been institutionalised for attempted suicide. Lily is suddenly very tired, and goes to bed.
Chris pulls Jen aside, explaining Anna's suicide attempt and that she is bipolar. When she tells her Anna plans to call 911 to thwart the euthanasia, Jen confronts her sister and talks her out of it. However, downstairs Jen sees Paul and Liz embracing. She stays up all night, scouring over photo albums and realises Liz has been with them on all family trips.
In the morning, although Lily wants them to have a lazy Sunday, Jen gets Anna to back her in announcing they will block the euthanasia by calling 911. Trying to get Paul or Liz to confess, Lily tells everyone it was her idea, as she doesn't want either to be lonely.
Lily gets everyone on board with the procedure, but Jen and Anna insist on being with Paul at her side while she drinks the medication. Afterwards they drive off, one by one.
