Mystery mystery by the winner of the Star of Ink literary competition
One autumn evening, a trouble-free student named Sara Lindert walked into the subway and was never seen again. Chief Investigator Richard Ehler links Sara's disappearance to an old case that continues to haunt him years later.
Her sister Klaudia and Sara's boyfriend Oliver are also looking for the girl. They and the police know she didn't disappear voluntarily, and they soon find out that she's not the only one who's gone missing. Because more and more people are starting to disappear on the subway. Claudia is convinced that something lives deep beneath the city that cannot be explained or described. An invisible evil that hungers for its next victim. And that's who she's supposed to be.