When Steam Smythe 'time travels' his way into a Renaissance Faire and kidnaps Max, Ben and Gwen must defeat him without breaking character.
The Tennyson's arrive at a renaissance fair, Ben is amazed at two knights fighting. The Knights stop fighting at the site of Ben. Ben complains as to why, and the knights tell him that he is an innocent, and they must not put him in danger, due to their code of honor. Gwen tells Ben that they take things very seriously, and they're really good at staying in character. Gwen and Ben makes a bet, whoever breaks character first, looses. Max also claims he's a wizard. Ben Transforms into Diamondhead and creates a knight helmet for himself, Gwen tells Ben about the knights code of honor. Ben sees it as standard hero stuff, and Gwen tells him that knights don't run into battle on impulse.
Somewhere else, Steam Smythe is seen creating a time machine, with the assistance of Aristocrow. He plans to go back in time to the steam age, and prevent tech from ever being invented. Aristocrow gets on top of Steam Smythe's machine, and Steam Smythe gets inside. Aristocrow lays an egg, which causes the machine to go flying super fast through the sky. Aristocrow believes Steam Smythe blew up, and died.
Steam Smythe lands at the renaissance fair. He meets a blacksmith who tells him the "year he's in". Steam Smythe cries over going to far back in the past. Smythe tells the blacksmith to build something for him. The blacksmith tells him that he serves the king. Smythe looks for a king, and notices Gwen's crown. Ben almost breaks character, and tries to attack Steam Smythe, but Gwen remind him about the code. Smythe bows down, noticing Ben as a Tennyson from the past. Smythe tells them that he's from the future, and he demands to use their resources. Ben whispers over to Gwen, noticing that Steam Smythe believes that he is actually in the future. Ben tells Steam Smythe that they refuse, and calls him 'future man'. Steam Smythe gets insulted by the term Ben used, and challenges him to a dual. Ben accepts.
Gwen reminds Ben that transforming in the 'era' that they are in, would break character, so Ben asks Max to use one of his 'spells' to transform him into an alien. Max uses a fake spell on Ben, then he transforms into Humungousaur. The audience clears for the dual to begin. Ben starts attacking Steam Smythe. Smythe calls a time out, saying that he requests a weapon as well, per the code. Smythe request the wizards wand. Max gives him the wand, but the wand does nothing. Steam Smythe manages to use the bone to hit Ben in the face, blinding him while he uses his tools inconspiculessly to help him win. He shoots rope around Humungousar's leg. Ben umps over to him, causing an anvil to fly up. He grabs it and distracts Ben, while the anvil falls on top of Ben's head. Steam Smythe believes he earned their supplies and resources, Gwen tells him he won't get any. Steam Smythe goes to max, and demands him to use his magic to bring him home. Smythe captures Max and brings him towards a castle. Gwen and Ben notices a note on the piece of chicken Max left behind before he was taken. They find out that he is distracting Smythe, and Ben and Gwen should save the fair. They both stop pretending, and focusing on saving Max. Gwen comes up with an idea to best Steam Smythe.
Back at the castle, Max shows Smythe a few tricks, which amazes him. Steam Smythe asks Max to use his magic to send him through time, but Max tells him he has no idea what he's talking about. Soon Gwen calls out from outside. Gwen puts on a play in front of the towns people. She tells them about a man from the future who came to take over their town. Ben rolls out, dressed as Steam Smythe. He acts like Steam Smythe, but less intelligent, Steam Smythe shoots at the two, and Ben transforms into Cannonbolt, then goes Omni-Kix. Steam Smythe shoots at Cannonbolt multiple time, then runs out of ammunition. Gwen and the other towns people bring over a catapult, and flings Cannonbolt over to Steam Smythe. Cannonbolt captures Steam Smythe, and rolls around superfast, causing him to glow green, then flings Smythe far back to where he came.
Steam Smythe lands back at where he first built his time machine, surprising Aristocrow, making him happy. Back at the faire, Max runs out and complements Ben and Gwen for defeating Steam Smythe. The Tennyson's prepares to leave, but they are soon escorted out by the knights for breaking character, other than Max
Ben: Sir Wizard. Max: Yeah. Ben: I require your (winks every other word) magical spell to transform my body to another form. Max: (Winks) Okay. I'll use my magic wand. Steam Smythe: Why is everyone blinking so much? Gwen: My kingdom is very dusty. Max: Behold all ye, and witness a wizards power. Presto change-o! Ben: Oh, the power, it is changing me! (Transforms into Humungousaur) Humungousaur: (Roars) Steam Smythe: That bone wand, it changed a boy into an oddly familiar creature, almost like... All: (Gasp) A dragon!
Steam Smythe:Now that I've bested your knight, I have more than earned your approval for supplies and labor resources. Gwen: Nay, I thinketh not. Steam Smythe: But what about the code? Knights: Honor the code! Gwen: This applies to knights and duelists. Kings are exempt. Steam Smythe: Then forget the code!