Star receives the royal magic wand but her parents panic and send her to Earth.

Star's best friend from her home dimension visits and is threatened by Star's new friendship with an earthling named Marco.

After failing a math test, Star tries to convince her teacher to change her grade.

Star misunderstands when she hears that the school football team is going to "get slaughtered".

Marco's hurt arm is accidentally turned into a giant tentacle.

Gustav comes to visit the Diaz family.

Marco tries to cheer up Star and ends up summoning Ludo and an army of monsters!

Star and Marco must navigate through a maze-like store, Quest Buy, to get a new wand charger before Star's wand dies forever.

Star forgets to get the Diazes an anniversary present, so she invites them on a trip to Mewni.

Star crashes a birthday party but has to fight off Ludo's monsters.

Star starts sprouting hearts all over her body, the telltale sign of "Mewberty."

Marco and his friends travel to a dimension of pixies and are forced to work in the Shard Mines.

Star and Marco attempt to help Lobster Claws adjust to life on Earth.

Star and Marco try to determine who has been redecorating her room, with Mr. Diaz only accounting for a small project. Marco discovers that Star has been "sleep spelling", that is, casting spells when sleepwalking. He tries psychology to try to treat her but learns that she is actually trying to defend herself from an intruder, revealed to be Princess Smooshy, an ugly "goblin-elephant" princess who wants to steal Star's face so she can avoid getting sent back to St. Olga's Reform School for Wayward Princesses after escaping it.

Star's ex-boyfriend Tom invites her to the Blood Moon Ball, an Underworld event that occurs once every 667 years. Tom claims he has turned over a new leaf, having hired an anger management consultant. Marco does not believe Tom has changed but Star decides to go anyway. When Marco disrupts Tom's plan to take Star for himself under the Blood Moon's light, Tom reverts to his old self.

Following yet another victory over Ludo and his minions, Marco and Star eat at a Chinese restaurant. Marco tricks Star into thinking the sayings in fortune cookies can really predict the future. Meanwhile, Ludo hires a monster named Toffee to shape up his minions. They come up with a plan to take advantage of Star's fortune cookie obsession.

Star freezes time with her wand so that Marco can appear at Echo Creek Academy on time for his morning greeting nod with his crush Jackie Lynn Thomas. But when she is unable to cancel out the effects, she and Marco visit the Plains of Time in order to get Father Time to restart time again.

Star gets an unexpected visit from her father who had been kicked out of the house for not picking up after himself. After getting excited over Earth activities such as using a flush toilet and playing miniature golf, he ends up overstaying his welcome. He hosts a party with his inter-dimensional friends, but it is soon crashed by a sun character named Helios.

Star and Marco go undercover as new princess students in order to break Flying Princess Pony Head out of St. Olga's on her birthday. They discover that Pony Head has been brainwashed to be a compliant princess and try to evade the robot guards and the reform school's headmistress Miss Heinous.

Star Butterfly recruits her classmates, Miss Skullnick, and the Dojo Sensei to participate in a battle reenactment of Mewni's Independence Day. Ludo and Toffee use a special floating eye device to spy on Star and her activities. Ludo's minion Buff Frog infiltrates the reenactment as one of the monsters to try to steal the wand.

Impressed by a commercial for a "magical" Earth product called a Banagic Wand, Star tries to get Marco to buy it, but Marco refuses as he has karate class. Star ends up going into town by herself where she confuses a pirate-themed restaurant for having real pirates and trashes the place. Meanwhile, Marco's Dojo Sensei wants his students to channel their emotions to walk across hot coals.

Miss Skullnick's class finds the field trip to the Echo Creek Museum of Paper Clips boring, so Star volunteers to lead a trip to the Dimension of Wonders and Amazement. But when she lets the students do whatever they want, she puts the entire class in danger. Meanwhile, Miss Skullnick visits an exhibit on troll history. When a yarn monster captures the class, Star and Miss Skullnick must work together to save them.

Star botches a spell that would help Marco grow a beard in order to impress Jackie Lynn Thomas. The hair grows out of control, engulfing the house, and Star loses her wand in the midst of it. Meanwhile, Ludo leads his minions through the overgrown beard to find the wand.

Toffee has taken over Ludo's castle; he has one of Ludo's minions abduct Marco. Star allies with Buff Frog (and the kicked-out Ludo) to storm the castle and beat up Ludo's former minions and free Marco. However, Toffee arranges for the box imprisoning Marco to gradually collapse, forcing Star to destroy her wand in exchange for sparing Marco. The resulting explosion destroys Ludo's castle and Toffee, after which Star banishes Ludo. Star is left with a new wand that is missing a piece.