Randy must find a way to juggle his life as a ninja and his friendship with Howard during the battle of the bands, while McFist tries to use a truth device that will reveal the ninja's identity during the show.

After a power outage at school, a Stankified Monster frozen in ice is freed. When Randy de-stanks him, he and Howard learn that his name is Dickie and his monster form was frozen in ice by the Ninja of 1985. When Dickie (voiced by Bobcat Goldthwait) is saddened by this and how he missed his chance with Tawny (voiced by Annie Potts), The Sorcerer takes the opportunity to re-stank him and find out what is the object of his stank.

During the premiere a new 6D film, the movie's title character comes to life and threatens to destroy Norrisville.

Randy helps students escape from Detention Island.

During Ninja Day, McFist schemes to steal the spotlight by introducing a new hero - himself; the real Ranginald is in danger of McFist's fury.