A thin coat of dust covered the ground, disturbed only in one line. The kind of line the passing of feet over many days might make.
Evan glued his eyes on the trail and followed it.
"Single file," he said softly.
Their little platform widened. An old metal gate stood open. There was paint on the walls from kids and broken tiles on the floor.
"An old platform?" Jamie asked.
"Looks like it," Harper replied.
Jamie kept going. "The closest metro stop isn't even a block away. There are probably a dozen entrances to this place."
That made sense, not that it helped them find their guy.
"Which way do we go?" Harper asked.
"Evan's got the trail," Logan replied.
Despite the taggers and other refuse left from squatters, it was all old. There'd only been one path taken through here lately, and it was easy to follow.