When finding a man who appears to be the tax-man, Robin and his group break into Nottingham Castle to steal the mountain of Tax silver and give it back to the poor. However, they are tricked and end up locked in a room with no money in it. The sheriff rewards the tax collector for this. Marian argues with her father; reluctant to marry Sir Guy, she goes to the castle to meet a mother superior (played by a black actress, in an instance of colour-blind casting), the Abbess of Rufford, there in an attempt to become a nun. The mother superior is being held in the castle's chapel by the Sheriff, where the Sheriff is keeping the tax silver secure.
Robin and his men manage to escape, whilst the 'tax-collector' and 'Mother Superior' (in fact a team of con artists) steal the silver from the chapel. They are both helped by Marian. The sheriff discovers his loss of the treasure too late. Meanwhile, Robin and his band capture the con-artists in the woods on their way to Holland. They offer to take Robin and his gang to let them go and come with them to Holland and live the high life. However, they refuse, relieve them of the treasure, and turn them out of their cart into the mud.