Kim Moreno, a clinical lab technician with a leading Biopharma firm is at the top of her game. All the while she's living with intense anxiety and grief caused by the traumatic death of her baby sister Grace ten years ago. How did she really die and why did her father disappear, never to be heard from again? To manage her anxiety, Kim self medicates with synthetic opioids, stolen from work. Years later, helping her mother move into a new home, she hears cries for help coming from a nearby river, and her life changes forever. Kim dives into the freezing waters of The Souhegan to try and save a young girl named Julie. She lives in a secret cave community with a group of teenagers that are fighting off their illnesses and Lee Chen, the head of a mining operation. They're threatening a massive cave-in to unearth a rare metal worth billions. She allies with Nick, a handsome cowboy whose life is troubled. Together they set in motion a chain of events that plunge Kim into a cave world that is filled with wonder, romance, and death for everyone unless the miners can be stopped. An epic battle wages, the ground is shaking and the clock is ticking. Tic, tic, tic