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.

Amanda develops a crush on a thief named Flint Forster; Owen misinterprets Amanda's cagey behavior.

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.

A scientist's assistant steals Owen and Quentin's science fair project and uses it for vengeance.

When a rival cheerleader from Amanda's past resurfaces, Mike and Owen go under cover as cheerleaders to catch her.

Mike throws Martin a last-minute birthday party; Martin's birthday party is overrun by Ishina.

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.

Flint Forster learns Amanda's real identity; Mike must rescue Flint and Amanda when they are taken hostage.

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.