Just prior to Henry's 1415 invasion of France, a plot was exposed involving Henry Lord Scroop of Masham, Sir Thomas Grey of Northumberland, and Richard, Earl of Cambridge. The men, who are in Shakespeare's play three of the King's closest advisors and confidants, had been paid by the French to arrange the death of king prior to the invasion, and were summarily arrested and executed for their intended treason. (It was likely the trio's intended replacement for Henry, Edmund Mortimer, a legitimate claimant to the throne, who alerted Henry of the plot in order to save his own life in case the plot were to fail.)