Juan, Miguel and Margarita are three small neighbors and friends, who like meeting to play after school. However, one evening, Juan had to accompany her mother to buy a birthday present for an aunt- grandmother who he hardly saw. In the shop he knew Mary, a strange girl who helped them with their purchase. In the centre of the establishment there was a counter of glass on which an old cash register rested on it. Through its transparent walls he could see small mirrors, clocks, cigarette cases and a lot of objects that John was unaware of their use.
Around the counter there were distributed tables, shelves and ladders that leading to nowhere, full of objects. At the bottom of the store, on the left, a blue velvet curtain hid a total darkness that looked mysterious to Juan. However, on the right, another blue curtain hardly opened let guess a yellowish glow behind it. What would be there?
On a subsequent visit to the facilities of the local newspaper, the mysteries of the antique shop increased. The three children helped by Sonia Prieto, a journalist, and by Mr. López, a teacher of the children, tried to clarify the questions.