Jennet of Elsdon and her husband Thomas are accused of witchcraft and sentenced to death by Abbot Hugo. The Sheriff of Nottingham offers to spare their lives if Jennet will use her powers to render Robin helpless and put him at the mercy of Gisburne and his men.

Robin faces the wrath of the Knights Templars, seven fighting monks who are among the most feared warriors in Europe. Led by the fanatical Renald de Villaret, they believe Robin has stolen their sacred emblem.

Alan a Dale arrives in Sherwood threatening to kill the Sheriff. The object of his affections, Mildred, daughter of the Baron de Bracy, is being forced against her will to marry the Sheriff of Nottingham. Robin decides to help the young lovers.