In the Up Top of Silo 20, people are free. Free to cling to the hope of what is beyond the Cleaning. Free to sleep among the mounds for the good of all. Not so for those in the Down Below. For them, there is nothing but the fields and labor and death … Until now.
A few, like Jook, hear a sound that resonates with a dim reminder of something those Up Top wrongly believe they have and those below never knew existed. With the only world he has ever known gone mad, he has nothing but questions. Questions that can only be answered in a place all have been taught to fear since childhood.
Finding answers means the unthinkable. There is no way to get there, but the Silo is calling him Into the Forbidden.