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Alan Grant, a Scotland Yard detective, has fallen into a cellar in pursuit of another criminal. In a hospital bed, he studies portraits of people whose lives were shrouded in mystery, including the murderers of innocent children, a tyrant and despot - Richard III.

If you trust the portrait, Richard III does not look like a murderer. Then, if he didn't kill his nephews, why did he go down in history as an ugly villain? And what really happened to the princes?