

In the city of Hinaro, seventeen-year-old Mia watches her brother Shero enter the brutal, nonsensical tournament that demands its contestants be eighteen. The day before his first match, as he gives her a protective aquamarine necklace, Mia’s laughter dies—she locks eyes with a strange boy on the tram stairs, his chilling song heralding a truth no one else sees: the tournament consumes more than just its willing players.