In the future, humanity is ranked by genes. The System turns those at the bottom, the “Lost,” into monsters, erasing their identities and culture completely. Engineer Ethan is framed and branded one of the Lost, then exiled underground. With the help of the resistance fighter Leah, he uncovers the System's enormous hidden lie: these “monsters” are all living, breathing people! Together, they fight to reclaim the identity that was taken from them, to answer the question “Who am I?”, and to find a future for humanity.