Shunsuke Takeda, who works at the ward office, is being followed by a young man named Toshiki.
He has no interest in him at all. He doesn't show a shred of sympathy not only to the man, but also to the abandoned children delivered to the office.
She has no sympathy for him. He doesn't even know the person who lives in the next room of his apartment.
Shunsuke was a person who "lived alone" without any relationship with others.
Toshiki was attracted to Shunsuke's way of life and followed him around. However, their ambiguous relationship.
One night, however, their ambiguous relationship is upended by a song that leaks from the next room.
The song, which is somewhat sad and lonely, strikes a nerve in Shunsuke, and he knocks on the door of the next room.
There was an old woman living alone in the room. The old woman said to Shunsuke,
"I will become the wife of the person who is attracted to the song. I've been waiting 400 years for this."
The old woman presses him, saying that the song will touch the hearts of lonely souls, but Shunsuke does not agree.
But Shunsuke doesn't care. However, as the song continues to be heard night after night, Toshiki's behavior begins to deteriorate.
The relationship between the two, which had been built on mutual restraint, begins to waver slightly.
Shunsuke begins to search for the old woman's true identity.However, no matter where he looked, he could not find any official records of the old woman, such as her resident card, family register, or tax records.
There are no official records. The old woman, who sings a mysterious song by herself, is really a person who has no record and should not exist.
Is the old woman, who sings a mysterious song by herself, really a "Methuselah" who has lived for 400 years?
　　
A young man with nowhere to go, an abandoned child that no one knows, and an old woman who should not exist. The invisible people Shunsuke's encounters with invisible people living in the gaps of the big city change everything for the better.
He begins to feel emotions that he has never felt before...　
The film is set in Tokyo and depicts the loneliness and emotional regeneration that many modern Japanese face.

An inexplicable shadow begins to appear in front of a man who has suffered severe brain damage and is about to commit suicide. The shadow begs for your brain, your eyes, and your ears if you are going to die. The man is desperate for life, but his family has left him with a lot of regrets.
The shadow eventually reveals itself. It takes the form of a huge black crow and calls the man to the wilderness.

The front lines of war. An officer is secretly executed by his allies. The officer was found in the dungeon of an enemy-occupied building, where he had been taken prisoner. He was found in the dungeon of an enemy-occupied building as a prisoner of war, but the military superiors, who were supposed to be his allies, shot him dead so that no one in their own army would know about it.
One of his men was left behind to execute the officer. As he listens to the sound of his army's boots moving, the officer begins to tell his men what happened in the dungeon.
There were three prisoners, including himself. Soon, it became a fierce front and the enemy abandoned the building. But the prisoners in the dungeon were forgotten and abandoned. For three months, until they were discovered by their allies, they were left to wonder what had happened to them in the forgotten dungeon.