When Detective Mara Vance investigates a long-abandoned station beneath the city, she discovers more than rusted walls and broken tracks. Drag marks in the water, strange noises echoing through submerged tunnels, and cryptic notes from a missing researcher point to a nightmare waiting below.
As she and young apprentice Lucas Bright descend into the depths, they uncover a horrifying secret: an ancient, intelligent creature has survived decades underground, along with a nest of hatching horrors. The tunnels are alive, and every step brings Mara closer to confronting a predator unlike anything she’s ever faced.
Detective
Survival
Monsters
Thriller
Mystery
Psychological
Exploration
Adventure
Hero
Audiobook details
GenreMystery and Thriller
Length45 mins
Narrated bySelect Your Own
FormateBook with Audio
Publish dateMar 6, 2026
LanguageEnglish
Table of contents
1Chapter 1
6Chapter 6
2Chapter 2
7Chapter 7
3Chapter 3
8Chapter 8
4Chapter 4
9Chapter 9
5Chapter 5
About the author
Karen Sondra
Karen Sondra is a passionate writer whose words pulse with raw emotion, vivid imagery, and an unyielding curiosity about the human experience. With a deep love for language, she crafts stories, essays, and poetry that explore the complexities of love, resilience, identity, and the quiet beauty in everyday moments. Driven by an insatiable drive to connect hearts through honest expression, Karen pours her soul into every line, inviting readers to feel seen, understood, and inspired. When she’s not lost in her notebook or typing furiously, she’s chasing sunsets, collecting fragments of overheard conversations, and dreaming up her next tale.View all by Karen Sondra
