The story begins with Robin Hood and his companion Jerry (Tom and Jerry) attempting to ambush a tax money transport going through Sherwood Forest. The transport is a setup for a trap by the Sheriff of Nottingham, John, King of England's right-hand man, who is accompanied by his henchcat Tom (Tom and Jerry). However, thanks to Jerry's advance warning, Robin has summoned his Merry Men to the scene, turning the ambushers into ambushees and successfully seizing the gold transport. When John and the Sheriff discuss this latest fiasco, the Sheriff deduces that Robin uses Jerry to ferry information to and from a spy inside the castle and tasks Tom to catch the mouse in order to flush out the traitor.