Emma Quinn is a thoroughly modern twenty-first century woman. When she returns to her hometown of Colorado Springs, CO, to plan her wedding, she and her friends take an afternoon off to tour nearby Cave of the Winds. While deep within the cave, an earthquake hits, and a falling rock knocks Emma unconscious. When she wakes, she discovers her whole world has been destroyed. Transported by the earthquake to the year 1882, Emma finds herself a suspect in the murder of Carson White. With the help of her new friends, Dr. Alice Guiles, Claire La Salle, and Levi Warwick, she must clear her name and learn how to survive as a woman in the nineteenth century American West. Will her enigmatic relationship with the Native American man, Ancha, be the key to her return to her own time?