The Phone She Left

The client could not stay in the chair five minutes. She introduced herself as Kim Sa-wol and said someone had been following her. Then she said the details could wait until next time, and asked where the toilet was. That was forty minutes ago. The one at the end of the corridor was empty, and the ground floor CCTV shows her walking into the building and never walking out. Her phone is still sitting on my desk. Three unread messages on the screen. I have to unlock it to learn who was after her. Fortunately, in one corner of the request form she left behind, there is a small note in her own hand.