Cobalt, Chrom, Kei, and Neon are androids living together in an abandoned house. In order to pay off a huge electrical bill, the four decide to compete for prize money at the Babel entertainment tower. After their first performance, they meet Esora, a boy struggling with the recent loss of his father. The encounter activates a special program within the four androids.
Esteemed Climbers, now is the time 
to assemble at the tower of wisdom!
أيّها المُتسلّقون، الآن وقت اجتماعكم
!في برج الحكمة
Liebe Climber!
¡Queridos Climbers, es hora de reunirse
en esta torre de sabiduría!
¡Queridos Climbers, es hora de reuniros
en esta torre de sabiduría!
Climbers, il est temps de vous rassembler
à la Tour de la Sagesse !
Miei cari Climber, correte tutti 
alla torre della saggezza!
Estimados Escaladores, agora é a hora
de se reunirem na torre da sabedoria!
О Восходящие, настало время
собраться в Башне Мудрости!