In order to find the truth about what happened, Tooru leads his father away from the group as they sneak into the lab.  But his father finds out what he's doing and sets an ambush for them.
There really was an old lab for 
the factory under the school.
Unter der Schule ist ja
tatsächlich ein altes Fabriklabor.
Sí había un laboratorio bajo la escuela.
Sí había un laboratorio
bajo el instituto.
Il reste une salle de Keito
dans les sous-sols de l’école.
C'era davvero un vecchio laboratorio 
dello stabilimento sotto la scuola.
Tinha um laboratório antigo
da fábrica sob a escola.
Под школой находится
старая лаборатория.