After having tricked Prince John, a magician seeks refuge at Ivanhoe’s castle in Rotherwood. Front-de-Boeuf discovers the magician’s hiding place and threatens to hand him over to the Regent if he doesn’t find out where Ivanhoe has hidden the treasure. Terrified by Front-de-Boeuf’s threat, the magician betrays Ivanhoe’s trust and sets a trap for our hero.