In a hectic city of 35 million, Kumiko (Academy Award nominee Rinko Kikuchi) feels devastatingly alone. Trapped in isolating psychological torment, Kumiko —a meek twenty-something struggling to make it on her own in Tokyo—lives in constant resentment of her dead-end job and demeaning boss, her more successful peers, and her relentlessly nagging mother. But her spirits lift when, in a fictional American film, she observes a man bury a satchel of money in the wintry Minnesotan landscape. Though only witnessed on a fading VHS tape, she becomes convinced that the treasure is real, and merely awaiting discovery by a courageous dreamer like herself. With little more than a self-made treasure map, Kumiko sets off on an epic, unpredictable journey across the Pacific and through the icy plains of Minnesota to unearth her mythical fortune.