A life-size Air Doll lives in a shabby apartment in Tokyo. She cannot speak, nor can she move. But she is the only companion her middle-aged master has. He talks to her, puts her in a bath and makes love to her every day after he returns from work. This routine life is disrupted when fantasy turns into reality. The Air Doll suddenly comes to life, filled with a soul. Like a newborn baby, she doesn't understand what is going on around her, but she sees a world waiting to be explored outside of the apartment. Eventually venturing into the outside world, the Air Doll is fascinated by everything she sees, and though she meets many people in all walks of life, they can't seem to provide her with an answer to what "being alive" means. An erotic fantasy that explores the complexities of love and loss, joy and pain, fantasy and reality, internationally acclaimed director Kore-Eda Hirokazu returns with this bittersweet love story that examines the intricacies and frailties of human existence.