Genya Tachibana, a documentary filmmaker, has succeeded in locating the famed actress Chiyoko Fujiwara, who inexplicably vanished in the midst of her career in the 1970s. When he gives her with a key that she had misplaced and assumed was lost forever, the filmmaker has no way of knowing that it will not only unlock the long-held mysteries of Chiyoko's life... but also his own...