A horrified Robin realises that his plan to capture the Sheriff's spy Henry of Lewes has failed because he has a traitor in his gang. Luckily,Henry has arrived at the castle unconscious and Robin can also depend on Marian's spying and loyal wise-woman Matilda to help him in his mission. Can Robin silence Henry and rescue Matilda before the Sheriff ducks her for witchcraft, and will he work out who the traitor is?

Robin is determined to get hold of the Great Pact of Nottingham, but when a lovelorn Knight begs the outlaws to help him save his girl, Robin decides he'll use the Knight's silver to locate where the Sheriff'streasure, including the Pact, is hidden. But with Allan A Dale now firmly on the dark side and leaking the outlaws' secrets to Gisborne, Robin realises he must act quickly to save Marian. Worse still, Edward has his own agenda for the Pact, with tragic and life-changing consequences for Marian.