Roxana Aubrey decides to drop her studies and escape her life in Paris for a free diving course in the south of France. She is quickly pulled into a life that reaches new depths brought by the weight of an ocean's descent.

Eugenie has a unique gift: she hears and sees the dead. When her family discovers her secret, at the end of the 19th century, she is taken by her father and brother to the neurological clinic at La Pitié Salpêtrière with no possibility of escaping her fate. Her destiny becomes entwined with that of Geneviève, a nurse at the hospital.