Wiltshire 1860: Lord Henry Pembroke has gone to great lengths to organize a ball for his beloved niece, Lady Jane, at Rosewood Hall. The guest list features the most sought-after bachelors of London society, as the ailing lord wishes to secure his niece's future, who is like a daughter to him. However, the evening takes a completely different turn than planned. A wounded girl stumbles through the wintery night of the ball in the park of Rosewood Hall and is discovered by Lady Jane. Jane, an unconventional and overly confident young woman, takes the nameless girl into the conservatory. With her last breath, the dying girl asks Jane to find her friend Mary and save her from a terrible fate. The plight of the tormented creature deeply affects Jane, and she promises to help. Unexpected support comes Jane's way.