Class 1A, Hero Course, along with pro hero, Shota Aizawa also known as Eraserhead were send on a mission to a laboratory. Police has reported that scientists were experimenting on children.

They walk through a hallway they seems endless, until they see one of the doors is slightly open.

Uraraka: Should we go in?

Izuku: I don't know, what do you think, Aizawa sansei?

Aizawa: I'll go in, you all follow me.

They come inside of the room...