A prep school student living alone in Tokyo from Fukushima is suddenly visited by his mother. For some reason, she is wearing a white motorbike helmet. I wonder if she has come alone from Fukushima on her motorbike. When she comes into the room and puts her feet up on the kotatsu, she doesn't take off her helmet, and she is still holding the shopping bag with the leek in it. Her mother refuses to say anything. The mystery deepens and fear creeps up from the depths of the night... A Japanese "cautionary" horror film about what can happen in everyday life.