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A person's legs and feet in dark shoes are shown stepping onto a brick surface, followed by a close-up of the feet standing still. The scene then cuts to a group of people with distorted, mask-like faces in school uniforms, standing in a line against a brick wall, and then to a high-angle shot of a long queue of people in dark clothing standing in a narrow alleyway. The sequence continues with a group of silhouetted figures walking down a ramp in a dimly lit, industrial-looking space, and ends with a close-up of a large metal chute from which a stream of red, sausage-like objects is being disp