In Lisbon, Marcelo writes a novel, using the life of his own wife, Beatriz, as the main inspiration to the story. The creative process of the book takes a dangerous path, ultimately compromising the love they feel for each other.

Madrid. 1988. Daniel and Javier, aged thirteen and twelve respectively, have been punished and sent to the school principal's office. While they wait in the waiting room for the principal to see them, they chat about their present and their future, but there is something that particularly worries Javier. What exactly happens when you walk through that door?