After Connor unsuccessfully tries to infiltrate the dojo, the Ninjas learn that he is after the Floating Sword, and they realize he is much more treacherous than they ever imagined.
Owen gets an ego boost when a photo of him in his ninja suit goes viral. Before Owen can reap the benefits, The Shadow Master, an impostor looking to capitalize on ninja popularity, comes forward and steal's Owen's moment.
Mike is grounded after getting caught sneaking out of the house; Mike must find a way to help the ninjas stop Evil Grandpa and the Ishina from locating the dojo.
After the dojo is destroyed, the Ninjas bring in Kid Q to fix it and bring Hologramps back. Kid Q overstays his welcome and then lets the Ninjas' old nemesis Two Ton Harley out of prison.
Owen pursues his crush on Paloma Peru, while Gina, a twisted Benjamin Rush student, pursues her own obsessive crush on Owen. Meanwhile, Mike and Amanda bond after they both get hurt filming an audition tape for a game show.
The Ninjas investigate Mayhem, a social media star who organizes flash mobs to incite chaos. Owen is getting closer to Paloma, but Mike and Amanda have concerns since she made it her mission to investigate the Ninjas.
Mike is crushed after Flint asks Amanda to the Spring Fling. The night gets worse when he must team up with Flint to rescue Amanda who gets kidnapped. Amanda struggles with a decision to stay in Empire City or study in Paris.
Cousin Connor returns as a spy for Evil Grandpa, and discovers that the Kata, an old martial arts form, is the key to finding the Floating Sword. Amanda struggles with the results of a career aptitude test.
After Grandfather quits, his new assistant Andrea takes over and the ninja's have to save the day by getting Andrea things? That means that there is no mission for them to go on and Mike isn't handling it well.
