En una ciudad desconocida, en un edificio a través de las ventanas se puede ver el momento exacto en el que las cosas cambian. El antes comienza a ser el después y viceversa. Y nada vuelve a ser como antes. En este universo idéntico y diferente a la vez, se ve como los personajes cambian para siempre. In an unknown city, in a building through the windows you can see the exact moment when things change. The before begins to be the after and vice versa. And nothing goes back to the way it was before. In this identical and different universe at the same time, it is seen how the characters change forever.

An architecture student is obsessed by his girlfriend. When she is invited to go alone to a party sponsored by her company, he becomes paranoid. He arrives at their place unexpectedly and finds a man hidden under their bed. He follows the man trying to find his name and occupation, along a night full of incidents and misunderstandings.