The theme I was always reflected on is inner world of persons working in medicine, where work is connected to human suffering, pain and death as well as risk and responsibility.This topic had not usually been discussed until COVID-19 has focused peoples' attention on medical problems. «Behind the Red Line» is about specifics of work in operating block, closed object, which entrance is marked by the Red Line. Anyone who crosses this line, falls into the zone of inner anxiety, emotional and physical tension. My aim was to open the veil to this "operational theatre" and convey its atmosphere.