Yuriko (Kotomi Asakura), who lost her only young daughter and divorced, became a dumb woman due to the shock. She then started a part-time job at a small lunch box shop in a provincial city where she had drifted. The owner, Sato, had a wife, Kazuko (Firefly), and a daughter, Kyoko (Rina Hatsume). It was a dumb relationship. There was a man in the store who had a dark shadow who came to buy two lunch boxes every day. Yuriko, who cares about the man, follows him, and she finds out that the man is making a woman named Maki (Kyouko Maki) prostitute in a truck parked in the open space she arrived at ....