Encouraged by Rock's words, Spider is finally called to fight a monster'. It's a rare instance in a family show that shows that telling the truth has its down as well as ups. They come up with a plan to take advantage of Star's fortune cookie obsession. Star and Janna try to find replacement batteries by sneaking out to Oskar and getting ones from his keytar. In turn, this could be the moment where Mewni understands the their true future queen. Nevertheless, preparations for Star's Song Day are already underway, and Moon has sent the new official songstrel of Mewni to to write Star's Princess Song.
She takes him out into a junkyard to retrieve an oversized knight's armored boot, but a crow snatches it. Conflicted, Marco runs off only to see Star kissing Tom from afar. Posing as a local Woolett, Marco decides to spend time around town with Kelly by heading to the local library to return one of her borrowed books. However, behind Janna's back, Glossaryck takes Meteora back through time with help from former Magic High Commission member Reynaldo the Bald Pate. Things get complicated when the tadpoles sprout their legs and hop around.
They soon discover in the palace's underground chamber that Mina Loveberry has been camping out capturing unsuspecting monsters to keep order. While happy at first, Tom begins to suspect that Star is stalling, especially when she starts saying goodbye to people he has never met like Doop-Doop, her first spell which she left abandoned in a shed. Tom explains that she is scared that Star will hurt Tom again and that she knows that Star kissed Marco. She contacts Janna for help and proceeds to tell her that anything that remains of Glossaryck must be properly buried in a place of meaning for him. Upon retrieving her ledger, Moon finds that what has been haunting the castle all along was actually Mina Loveberry.
As Queen Moon explains, they don't want to know the real Star Butterfly, they just want to believe she is perfect. Star goes to Hekapoo's dimension to recover Marco, who had chased Hekapoo for 16 years before winning the challenge. However, she winds up turning her into a troll. Star helps Tom's mom to make a demonade but she overfills the mixer and the demon fruit gets out of the mixer making little fire demons appear, while it happens star notices that Tom's mom behaves weirdly near her. However, afterwards they discover that the pies from the festival were made using Moon's recipe, finally giving them a genuine clue. When a bag of potato chips is found, he and the giant spider fight until he wins.
Terrified of her, Rasticore tries to flee, but Meteora destroys Gemini, revealing that he is a robot, and the resulting explosion reduces him back to an arm. Meanwhile, Moon and River are trying to live a quiet life in the woods, until the Maizleys move in next to them. Marco assumes that Rich Pigeon is merely a normal pigeon and tries to make him sign the petition, but accidentally breaks his leg. Meanwhile, Miss Skullnick visits an exhibit on troll history. Afterwards, Rhombulus angrily leaves, while Marco and Tom, seeing it is too late to go to the beach, make a kiddie pool to cheer Star up. Having learned to keep impulsiveness in check, Star decides to stay for a bog party and going straight to Moon. People are going to be bringing up Sozin's Comet and Weirdmageddon left and right, but I'm not joking.
She has to take care of the dog and find its owner. . While they visit a Mewni village, Star sees her father strolling about, and directs the Diaz family into a deadly forest. Star tries her best to have both sides play together as mixed teams, but it only escalates into a fight with spectators joining in as well. Janna goes missing and screams attract the kids back to the house. However, River enters and reminds her that Star's Song Day festival is that very evening.
Ludo and his minions attack and hijack the bus. They eventually reach it, but it's revealed that, in order to break the curse, they will need to give up the memory of when they first developed feelings for each other. Pony Head finds the concept boring and tags along with Marco to pick up a pizza from Emilio's shop. The season concluded on April 7, 2018, with a two-part one hour finale. He encounters the rats as well as Ludo, who offers him Meat Fork's job. Upon being put to work to grind corn, Buff Frog frees himself to discover who is enslaving the monsters.
Then a tide washes him into the lake. During the seance, when Janna falls asleep, Star checks up on Marco with a spy spell, only to find that he and Jackie are having a good time together, which makes her jealous. What does he think is gonna happen now that he's disclosed the royal family's secrets to everyone? For all the pressures it can relieve, some truths can be very damaging, proving that they're better off kept secrets. Star then confesses to Marco before leaving. Meanwhile, Marco is tasked to find Marisol and gets his hand stuck in a drain pipe. The Sisters begin to become very close to star, and eventually reveal their intention to frame Pony Head for the False Murder of one of the sisters, as doing so would result in Pony Head losing the right to succeed to the throne.
When Star returns from the party, she is confronted by Moon, who tells her that she must leave Earth due to the situation. When he spots Star in the woods, he chases her until he realizes he is back on Mewni. Star then wakes up at home, with Moon still missing. The other monsters are summoned for a fight but they are beaten up. Archived from on August 1, 2015. As a distraught Dennis turns to leave, he is confronted by the castle's landowner, who reveals he tricked him into rebuilding it for him. She then agrees to get a horn transplant and returns to her former self, much to everyone's annoyance.