On her seventh birthday, Ronwa begins to hear whispers from the past.

In a mist-shrouded village, a silver-haired girl discovers she’s the only one who can see spirits trapped between life and death. Guided by the ghost of her twin brother Ron and a childlike spirit who lives in her favorite book, Ronwa must collect seven keys — each tied to a sorrowful ghost’s fate.

But...

Can a young girl find the strength to face the pain of the dead?
And when she learns how each spirit died...
will she still want to set them free?