Eva, a mysterious doctor, searches for an answer to her urgent dilemma as she unravels Dr. Anmuth's Book of Vision. Henry gets involved in her life and is forced to confront his own nature, as Eva faces the biggest decision of her life.
Undine works as a historian lecturing on Berlin's urban development. But when the man she loves leaves her, the ancient myth catches up with her. Undine has to kill the man who betrays her and return to the water.