37 years ago, Myrtle, known as Agent 28, infiltrated supervillain Dr. Rufus Dufus's lair to stop his rocket armed with lasers aimed at destroying Earth's communication satellites.

In the present day, the Loud Family heads to a tropical island for a vacation where their grandfather Albert plans to marry Myrtle.

At the Thunderbolt Resort run by Flip's cousin Flop Philipini, Lincoln witnesses suspicious activity while on a fishing trip with Myrtle and Albert.

Lincoln heroically launches it, and Myrtle and Lisa devise a plan to blast the rocket off course with a laser cannon from the Loud House, causing it to crash into the ocean.

Additional voices: Griffen Campbell, Ryan W. Garcia, Jake Green, J. P. Karliak, Keston John, Sunil Malhotra, Kamali Minter, Arnie Pantoja, Isaac Robinson-Smith, Alejandro Saab, Carla Tassara, Fred Tatasciore, Trisha Vo.

[2] Series regulars Bentley Griffin, Alex Cazares, Piotr Michael, Jill Talley, Brian Stepanek, Catherine Taber, Liliana Mumy, Nika Futterman, Cristina Pucelli, Jessica DiCicco, Grey DeLisle, and Lara Jill Miller lead the voice cast.

[2] The film was directed by series supervising director and co-executive producer Kyle Marshall, and written by Whitney Wetta and Jeffrey Sayers.

The idea bounced back and forth in the writers room, but no plans were made until Nickelodeon said that they wanted to do another film based on the series.

He added, "But all the while, I would say that no matter how we expand the world or how crazy it gets, we do try to always have some kind of grounded character story that lies beneath it that’s still kid-related.

"[4] To balance the film's large ensemble of characters, the filmmakers had them all ultimately work towards the same goal, regardless of side plots that had been set up.

[6] Fernanda Camargo of Common Sense Media gave the film a 3 out of 5 star rating, and called it "a fun but flawed addition to the series, best enjoyed by those already familiar with the Loud family's tricks".