The Bare Bum Gang and the Holy Grail

Ludo and Noah have gone to help an old man who has collapsed after being hassled by the Dockery gang. Everyone thinks he's a little bit crazy: he dresses in home made armor and has consequently earned the nickname King Arthur. When King Arthur asks Ludo to retrieve his treasure, the gang must sneak past security guards and overcome various obstacles to help the old man. But can they get to the treasure before anyone else?