Grace Plantagenet was the illegitimate daughter of Edward IV, and the half sister of the young princes--imprisoned in the Tower by their uncle, Richard III--who are believed to be dead. But in the 1490's, a young man appears at the courts of Europe claiming to be Richard, duke of York, youngest of the two boys. Richard is seeking to claim the throne of England from Henry VII. But is he the real heir? Only Grace Plantagenet knows the truth.