강남

This guide to the Gangnam subway station in Seoul returns to just after one in the morning on May 17, 2016, when a twenty-three-year-old woman walked into a restroom near exit ten and a man was waiting inside. It follows what happened the next day, as strangers began leaving white chrysanthemums and sticky notes at that exit, more than thirty-five thousand of them within two months, and what investigators later said about the man who did it. Look down past the shopping crowds around exit ten to spot where that stairwell still is.