Steph Jagger lost her mother before she lost her. Her mother, stricken with an incurable disease that slowly erases all sense of self, struggles to remember her favorite drink, her favorite song, and -- perhaps most heartbreaking of all -- Steph herself. Steph watches as the woman who loved and raised her slips away before getting the chance to tell her story, and so Steph makes a promise: her mother will walk it and she will write it. Too aware of her mother's waning memory, Steph proposes that the two take a camping trip out to Montana -- which her mother, on the urging of Steph's father, agrees to embark upon. An adventure full of horseback riding, hiking, and "tenting" out West quickly turns into one woman's reflection on childhood, motherhood, personhood -- and what it means to love someone who doesn't quite remember the person she spent her lifetime becoming.