Beneath the streets of Chicago runs a subway line that shows up on no map, no schedule, and no city record. Three friends stumble onto a platform that flickers between existing and not existing, where the trains that stop are never late and never early, only wrong. The passengers who board never come back the way they left. When one of them vanishes mid-conversation, the remaining two realize the station isn't hiding people. It's collecting them. To get their friend back, they have to learn the rules of a place that was never meant to be found, ride a train that erases its passengers one memory at a time, and figure out why the city itself seems to be helping the station stay hidden.



Connor Hayes CH writes character-driven mystery and supernatural thrillers for young adult and teen readers. Drawn to hidden histories, forgotten places, and the strange spaces beneath ordinary cities, Hayes blends atmospheric horror with genuine friendship and heart. The Unmapped Line is inspired by real urban legends surrounding abandoned transit stations.