The film is adapted from the director's novel of the same name, telling the love story of Tetsuo, a craftsman who makes inflatable dolls, and his wife Sonoko: Tetsuo fell in love with Sonoko at first sight and married her. He hid his real job and lived an ordinary life, but his excessive enthusiasm for making inflatable dolls put the couple's relationship in crisis. Under such circumstances, Sonoko confessed the secret in her heart to Tetsuo...