Miguel and Lucía are two children who spend the afternoon in the village as usual, playing and bothering the neighbors, but their daily routine is interrupted by the arrival of a new, unknown visitor to the village. The children try to find out who this visitor is by playing at being spies as they follow him around the village, but Miguel is convinced that he is hiding something. In the middle of their investigation, the stranger arrives at Lucía's house, and there they realize that this stranger is her father, whom she never knew.