San José of Costa Rica, beginning of the XXI century. A man with the appearance of an office worker travels alone in a train car. He accompanies his loneliness with an old tie until a woman in a yellow dress sits in front of him. Then a game full of curiosity, of small and unexpected disagreements, of closeness and silences begins between the two.
A seven-year-old boy awakens when a voice announces that his father is suffering from a sudden illness. His modest daily life is then transformed by visions of a giant mosquito, masked sprayers producing thick smoke screens, and a woman who distributes warnings throughout the neighborhood.
