Natalya Kalinina is a popular author of romantic mystical detective novels. This unusual combination of thriller and romance attracts a wide range of readers. We present her novel “Keys to Eternity” in audio format. The heroine, Olga, is passionate about spelunking and with a group of like-minded people explores caves filled with their secrets and riddles. But then members of her team begin to die—one after another. The clues lead to a mysterious client: by carrying out the group’s assignments, they violated one of his conditions. Determined to understand what is happening, Olga and the few remaining survivors decide to return to the place that holds memories. But there they face a chain of new mysterious events. Want to know how it ends? Listen to the audiobook!