When her beloved Moonsilver, the unicorn, is nearly killed by a hunters
arrow, Heart sneaks back into her village to get help froth the healer,
Ruth Oakes. But even greater danger awaits Heart and Moosilver in Ash
Grove. Rumors of Monsilver's secret have reached the ears of the cruel
Lord Dunraven. Once again Heart must flee, with Ruth's mysterious gift
-- a silver thread -- to protect her and Moonsilver.