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 haUndine 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.s to kill the man who betrays her and return to the water.