The ones closer to the noise may be more difficult to open, besides one in particular — in fact, this one seems to be strangely weak. With around 2~ hours worth of brute force, A4 will uncover a room strewn with torn fabric and cotten.

Should she investigate the room itself, she'll discover a survival hatchet, ducttape, blankets and batteries. There's no mistaking the faint stench of copper lingering in the room either. Huh.