Gillette Park, a sleepy town nestled in the Rocky Mountains, harbors a secret.

Twenty-three years ago, a young girl went missing. Two days later her body was found lodged beneath the footbridge over Boulder Creek. The murder shook the town but they soon found it was only the beginning. A serial killer hides among them—a serial killer who strikes twice, sometimes three times a year.

Mason Cooper couldn't wait to leave Gillette Park. At eighteen, she headed off to college and the bright lights of Los Angeles, thinking she'd never return home to the broken family and forgotten friendships she'd left behind. But being a cop in LA lost its charm and—after a breakup—Mason heads back to her hometown. The serial killer still haunts Gillette Park and she becomes consumed with catching him.

Dr. Grace Jennings has what some call a gift. She "sees" things. She "hears" things. Running from that gift was useless so she's learned to embrace it instead. Now the FBI has solicited her help in catching the serial killer. Not everyone in this mountain town has embraced the idea of bringing in a psychic, including Mason's uncle and boss, Sheriff Cooper. Mason is tasked with being the go-between and she soon finds herself with a front row seat as Dr. Jennings discovers the dark—and well hidden—secrets of Gillette Park.

As Mason and Grace's friendship grows, so does their attraction. But safety lies only with each other, as they battle the evil that lives in Gillette Park.