The Wars of the Roses are over, but the English throne is filled with blood and thorns. Seville 1483: Jack Wynter has been sent by his father on a secret mission to Spain to guard a locked chest and protect it with his life. But then Jack's father is accused of treason, and the entire family finds itself at the center of a deadly intrigue. Jack cannot help it: he must uncover the secret of the mysterious chest and return to England, where young Prince Edward is set to ascend the throne, while his uncle Richard of Gloucester is already plotting to seize power for himself.