Four people sit around a table in the backroom of a shady inn in Mewni's capital. Two monsters, a Lizard and a Frog, as well as two Mewmans discuss what they will be doing tonight. The Mewman at the far end of the table, a short man with orange hair and spade markings on his cheeks, stands up and begins to speak.
"Gentlemen, if all goes well tonight, that fool Shastacan will be dethroned, Queen Eclipsa will return to power, and with any luck we will bring about a lasting peace between Mewmans and monsters." The man raises his drink, his cheeks glowing. "However if we fail it is more than likely we will be brutally tortured and killed, and nothing will change. This is the last chance for any of you to back out." No one speaks or stands up. "Alright then, a toast to either peace, or high treason."
Record Scratch "Yeah that's me. Your probably wondering who I am, and how I got involved with a lizard, a frog-man, and their plans for high treason. Well, this was my plan, actually. Let's zoom back a few years…"
The scene changes to the Mewman royal palace. It appears to be early morning and Queen Solaria is walking through the courtyard with a nine year-old Eclipsa with a picnic basket. "That is Queen Solaria Butterfly and her daughter Eclipsa, the rightful queen of Mewni." Suddenly a short, squat, orange-haired six-year old ran up. "And that would be me, Spades Butterfly." The boy trips and slides on his face before getting back up and reaching Solaria. "I'm Eclipsa's brother."
"In all honesty, my sister and I never really got along." It changes to series of still images of the two growing up together. The first is an image of them on the same day at the picnic, Solaria's back is turned and she appears to looking over a map of a battlefield. The siblings are both throwing food at each other while their mother is distracted. "We competed in almost everything, just to prove we were better than each other." A still of the two playing a monopoly-esque board game together, Eclipsa is clearly winning and Spades looks ready to murder her.
"My sister started learning about magic when she was 13, supposedly to learn how to use her wand better, but I think she just was over-eager." It cuts to the two sitting in a library, Eclipsa is studying the spellbook. Spades is sitting in the back corner, around ten. "My interests were…focused elsewhere." Lightning flashes and we see Spades is reading a book titled How to stage a coup.
"Don't get me wrong, I love my sister and I always have, but I didn't think she could be a queen. I thought that she would mess up. She never seemed too…qualified. I realize now that's because I was comparing her to our mother. Really, I guess that just meant she wouldn't be a great general, but whatever. Past is past, I can't change what I did." It cuts to a ceremony of sorts, Solaria is about to hand Eclipsa the wand, (Eclipsa is now 14). Spades is standing next to them. "Quick heads up, I'm about to do a dumb thing." The scene changes to Solaria handing the wand to Eclipsa…but Spade snatches it before Eclipsa can. Spades is now aiming the wand threateningly at his mother. "Here's the dumb thing. I stole the wand, aimed it at my mother… and threatened to use it on her unless she promised that I would be king rather than Eclipsa being queen. My mother was silent…and then, she started to laugh, everyone else then joined in. I tried to tell her I was serious, but then Eclipsa, my dear sister Eclipsa, pointed out the surprisingly obvious flaw in my plan…I didn't know any spells. She then snatched the wand from me."
"My mother, publicly, told everyone that this was an elaborate joke. Privately, she chewed me out for several hours, telling me I had technically just committed treason, then she sent me to my room, and…" It cuts to a still of an un-amused looking Spades sitting at a table with a covered silver platter on it. "*sigh*, she had the cooks prepare my favorite meal to try and cheer me up. She…seemed to have a problem taking me seriously. In retrospect, I was eleven year-old whom attempted to commit a coup with no real plan, it's not surprising she didn't."
"The magic counsel convinced my mother that I needed to be punished so she 'banished' me to one of our summer homes. She and Eclipsa visited often and Eclipsa and I would send letters to each other from then on. Strangely, I grew to like my sister more from a distance. I even grew to miss her. Unfortunately I…I didn't see much of her after our mother died."