Colorado, 1880. Sophie lives peacefully with her father Ernest, a former colonel of the US Army, and their Indian mare Nola, the only remaining vestige of the Cheyenne presence. Their existence is shattered when James and Hank Lewis, the sons of Ernest’s former soldier, happen to pass through their farm.

1947. On a beach, Madeleine, a waitress in a hotel restaurant, mother of a little boy, meets François, a rich and cultivated student. The force of attraction that pushes them towards each other is commensurate with the secrecy that each carries. If we know what Madeleine wants to leave behind by following this young man, we discover over time, what François is desperately trying to flee by mixing Madeleine's fate with his.

Dahlia Brown, a woman leading a monotonous life, is plagued by terrifying nightmares. When these nightmares start occurring during the day, she becomes determined to unravel the mystery behind her haunting visions and embark on a worldwide journey. Along the way, Dahlia encounters a diverse cast of characters, each holding a piece of the puzzle that could help her decipher the cryptic messages tormenting her. However, she soon realizes that not everyone she encounters has her best interests at heart, as some harbor sinister motives that threaten to hinder her quest and endanger her life.