This is the diary of Officer X-127, who is assigned to the country's deepest bomb shelter housing important military personnel and equipment. For security reasons those who go down, stay down. 4,000 feet away from sunshine, LEVEL 7 is considered secure from the most devastating attack and has been prepared to be self-sufficient for 500 years. Marriages are made in this inverted heaven; food is taken in the form of pulp and pills. All is ordained by the god Loudspeaker which, unseen and omnipresent, voices commands for the good of its creatures.