Katrina lives in a world enclosed by walls and rock, illuminated by lamps that dictate the time and daily routines. Beyond this, the Pastores claim there is nothing but the lifeless infinity of the Ether. Her mother dared to question this truth — and vanished. Now, it is her turn.

Walter Tierno is a brazilian writer, illustrator, former advertising professional, and a very sincere liar. He began his literary career in 2010 with "Cira." He illustrates and lays out his own books. He invents his own problems.