I opened the cabinet at the end of my shift. Only that day's file slot was empty, and the dust outline was fresh.

• Choi DuseokYou're past the deadline to return the key. My desk, tomorrow morning.
  Jin TaeoI'll leave it there. You must have seen the empty slot too, Chief.
• Han SoyulDon't write about the dust here. A lot of people read this.
  Jin TaeoThe more who read it, the sooner we find out who touched it.