(The characters of Nathaniel Lynn Diaz 'The Marksman', Ember Coanstella, 'The Dancer of Flames', Raphael Lucitor, 'the Quiet Storm', Richard Lucitor, 'The Loose Cannon', and Twilight Aqua Butterfly 'The Glass Rebel Princess', are used with permission by fanfic writer Triggerhell, or DrekiSaga on Deviantart)

(The adult versions of Star Butterfly-Diaz, Marco Diaz, and Oskar Greason, are from a picture from kuki88: 'All Grown Up' on Deviantart)

(The adult versions of Tom Lucitor, Janna Ordania-Lucitor, Jackie Lynn Thomas, are from pictures by KujaroJutu on Deviantart)

In another dimension, in Echo Creek, Mewni-Earth, Star Butterfly Diaz, the queen of the planet, was looking at the view of it from her castle. Later, when she heard reports from the squire that Mina was causing trouble in another world, she called her husband, the king of Mewni-Earth, and her knight in shining armor, Marco Diaz...

Star: Marco, you will not believe this, Mina might have disappeared.

Marco: Where is she, Star?

Star: Apparently, our squire told us that she and Manfred are in a city called Foggy Bottom, which is in another dimension...

Marco: Just how would she cause trouble in a place that is foggy?

Just then, the couple's daughter, Twilight Aqua Butterfly, a princess who was next in line to take the throne, came up to her parents to ask what was going on...

Twilight: What happened?

Star: Oh, sweetie, an old enemy of ours snuck into another dimension.

Marco: Apparently, she'll want to see what 'monsters' there are lurking another in that world.

Star: This might not be good. We need to tell some of our friends as well.

Twilight: Can I come along?

Star: Sorry, Twilight. This enemy of ours could be too powerful, and we don't want you to get hurt. Your older brother and our guards will keep you safe until we get back.

Just then, the royal couple's oldest child, and Twilight's older brother Nathaniel Lynn Diaz came into the throne room.

Nathaniel: Mom, Dad, did you say someone is causing trouble?

Marco: Not here, son, but an enemy of ours, Mina Loveberry, has crossed into another dimension. We're worried about what she could do there.

Star: Nathaniel, could you look after your little sister while we investigate this?

Nathaniel: Of course, Mom. No one messes with my little sister while I'm in charge! (laughs)

Star: (to Twilight) Sweetheart, promise us you won't put yourself in any danger, okay?

Twilight: (sadly and reluctantly) Okay.

Star: Good girl. Marco, let's go see Tom and Janna first.

Marco: Okay, Star, let's head out!

The two rulers then headed out of their castle, and outside Earth-Mewni. Unbeknownst to them, Twilight had a bright smile, because she had thought of a secret plan that would help her parents out, to stop that enemy of this. Deep down, in the Underworld, in their own kingdom, Lord Tom Lucitor, and his wife, Queen Janna Ordania Lucitor, were taking care of some important matters, when some friends of theirs came rushing in...

Marco: Tom, Janna, we need your help!

Tom: Oh, Star, Marco, welcome! What's the problem?

Star: Former Mewman warrior Mina Loveberry has traveled to another dimension to possibly cause trouble there!

Janna: Star, what could Mina do without her powers?

Star: Well, the one thing I know about Mina is that she's crazy, so we don't really know what could happen.

At that moment, the Underworld couple's two sons, Richard and Raphael Lucitor, overheard the conversation, and wanted to join their parents in the fight to save the world...

Raphael: Is there a battle going on?

Richard: We can help!

Star: (amused) These kids take after their parents, don't they?

Tom: We trained them well for this situation.

Janna: Yep, they're also skilled with getting themselves into trouble.

Marco: Anyway, if we're going to get to where Mina is, we'll need Hekapoo's help.

Star: That's our scientist friend! She could get is there quickly!

Tom: We better hop to it, then!

Janna: Yeah, we can't let Mina destroy That dimension!

Star, Marco, Tom, Janna, Raphael, and Richard then went off to the High Gardens of Mewni-Earth

to go find Hekapoo. Meanwhile, back at the Butterfly case, Twilight was pouting in her room, because she believe her parents are overprotective over her...

Twilight: I just feel like Mom and Dad worry about me a little too much.

Nathaniel: Little sis, they're just going to protect you.

Twilight: Nathaniel, I just want to show them that I an a stronger and braver girl that they realize. (thinks for a moment) What if I follow where Mom and Dad are going, and help them out with

saving the universe, they'll think I'm more capable of being an independent person!

Nathaniel: (scared) Now, Twilight, I get that you want to impress Mom and Dad, but I don't know if you should do this... (then perks up with determination) unless I go on this journey with you!

Twilight then had a smile on her face, as she saw that her older brother had faith in her...

Twilight: Well, dear brother, should we find our where our parents are going?

With Nathaniel leading the way, the two siblings then walked out of the castle, with a good feeling to where their parents might be going...