Manny, encouraged by Kevin Smith to audition for the role again, decides to join a road trip to Los Angeles with Stüdz band members Sav, Peter, and Danny, led by Jay, who has borrowed a Degrassi school bus as travel.
Manny is still insecure about her acting and singing abilities due to her abusive relationship with her professor Mick, but she regains her confidence with Jay's help.
Paige is recruited for the lead role by Mewesical High executive producer Robbie and furnished with a personal limousine and a gorgeous mansion.
After vowing not to inherit Hailey's vain attitude, Paige quits her assistant job and invites Ellie and Marco from Toronto to celebrate with her.
Hailey pushes Paige to improvise her lines and assert herself, alienating Marco and gaining a reputation as a diva among the Hollywood scene.
Manny is reinvigorated after getting the news of Paige's open position, but stalls to arrive after the gang's bus is stolen and broken down.
Marco encourages Ellie to reach out to her family, but she lashes out and leaves to reconnect with a rehabilitated Craig, who is touring with Fall Out Boy.
After spending a romantic day with him, Ellie is surprised to find Craig's girlfriend Yvette waiting at his apartment.
Paige becomes Mewes' assistant, Ellie tearfully reunites with her father, and Manny and Jay promise to stay together after the movie finishes filming.
also refers to the Canadian series The After Show, which is co-hosted by Dan Levy who plays Robbie in the film.
Stacey Farber earned a Gemini Award nomination for best performance in a children's or youth program or series, as Ellie Nash in "Paradise City (Part Three)".