All of their hard work is finally done. The SOS Brigade shows off their feature film! A tale of battle waitresses from the future fighting against evil, alien witches, and teenage espers. It will probably make sense… right?

Haruhi Suzumiya is an eccentricity who dislikes the ordinary. If she could just meet an alien, time-traveler, or esper, her life would be made! Unfortunately, things just aren’t interesting. Until she decides to shake things up with her own club.

The SOS Brigade is now open! First, they need a computer for their club, and Haruhi is determined to get one. But is extortion the answer? Next, they need more members. And that requires… bunny outfits?! Finally, Yuki opens up to Kyon with a bizarre reveal!

Things are back to normal. Well, as normal as life can be with Haruhi. So of course she wants them to enter… a baseball tournament?! But when the game doesn’t go the way Haruhi wants, danger lurks just around the corner. They’ll have to win, or else.

The skies are overcast with a chance of rain, and Haruhi instructs Kyon to go pick up a heater. With Kyon gone, Haruhi takes pictures of Mikuru in various costumes for the movie's DVD cover, Itsuki helps how he can, and Yuki is left alone to read. After Kyon returns, he finds only Yuki in the club room and decides to wait for the others, but falls asleep. When he awakens, he finds Haruhi alone with him, waiting for him to wake up so they can leave. It has already started raining, so Haruhi borrows an umbrella from school for them to use. When returning home, Kyon finds a more playful side to Haruhi and in the end, she pulls a playful tongue-out face.

Haruhi is visibly bored and is not her usual energetic self. Ryoko Asakura, the class president, is concerned and asks Kyon to help her. Kyon later finds a mysterious letter in his locker, which directs to come to a classroom, where Ryoko confronts him. Revealed to also be an alien, Ryoko attempts to kill Kyon in order to provoke a reaction from Haruhi, but is stopped by Yuki. Later, Kyon meets Mikuru's older self that had traveled from the future, who reveals that Snow White is the clue essential to his future. Ryoko was reported to never have transferred into the high school, much to Haruhi's suspicion.

On the day of the school's cultural festival, the members of the SOS Brigade are involved in different activities. Mikuru and her class open a fried noodles café, Yuki attempts fortune telling, and Itsuki is in a play. Kyon attempts to enjoy a normal day. Kyon goes to the auditorium, where bands are playing for the audience, and falls asleep. When he awakens, he sees Haruhi walking on stage in a bunny girl costume with a guitar hanging from her shoulders.

North High School is preparing for the North High Festival. Kyon and Haruhi's class, class 1-5, decides to do some questionnaire. Haruhi does not like that decision and tells Kyon that the SOS Brigade will do something more interesting. She decides to make a movie clip that has Mikuru as the protagonist. One day, after school, Haruhi, Kyon, and Mikuru go to stores in order to get a camera and airsoft guns.

Preparation for the SOS Brigade's short film continues, with character roles revealed—Yuki as an evil alien, Itsuki as an esper, and Mikuru as a battle waitress from the future. Mikuru is forced to dress in an embarrassing waitress costume for her role, while Yuki appears as a witch. On the first day of filming, the Brigade film two commercials to advertise their sponsors with Mikuru dressed in her waitress costume and then her bunny girl costume, much to her embarrassment. They then film several scenes in a park, and Kyon points out that Haruhi did not actually write a script.