The premiere of Back to 15: Season 2 seamlessly continues from the cliffhanger of its predecessor, with Anita still grappling with the intricate labyrinth of time travel. However, an unforeseen twist unfolds as she endeavors to log into her Photoblog account, inadvertently finding herself catapulted back to 2006, albeit with an intriguing anomaly: she arrives two months ahead of her original timeline.
The episode kicks off with Anita attempting to access her Photoblog, only to encounter a frustrating obstacle. Joel, her buddy and fellow temporal adventurer, is unexpectedly logged in, triggering a system glitch that sends Anita spiraling back to 2006. Yet, this time, she lands in an alternate reality where her hair is adorned with purple highlights, and Luiza is inexplicably absent.
As Anita acclimates to this novel reality, she realizes that she has arrived on the eve of the fifth Festival of Culture. She is slated to deliver a speech and perform a dance to a rendition of "The Ketchup Song." While navigating through surroundings that are both familiar and strangely alien, she crosses paths with Henrique, Fabricio, and an enigmatic mime. However, Anita's mind is preoccupied with deciphering the mystery of how she has skipped forward in time by two months.
Meanwhile, Joel finds himself ensnared in the rippling aftermath of his temporal voyage, his thoughts spiraling into a tempest of bewilderment and disorganization. At first, he mistakes his disorientation for the hazy veil of intoxication. Yet, upon glimpsing Fabricio, the stark reality strikes him like a lightning bolt: he has been thrust back to that pivotal day where he publicly suffered ignominy during a magic trick at the Festival of Culture. Fueled by an insistent longing to mend his past faux pas, Joel makes an impulsive decision to forsake his magical performance and, instead, recite a poem.
Anita, observing Joel's peculiar demeanor, swiftly deciphers that his poem hails from the future. She pieces together the clues and confronts him about his temporal escapades. Joel confesses that he had logged into Anita's Photoblog account as a retaliatory measure for ditching him to Paris with Henrique. He openly expresses his longing to revert to the present, but Anita stands firm, insisting that they must mend the fractured timeline.
Joel's frustration mounts to a boiling point, leading him to unleash a torrent of rage. He smashes Henrique's guitar into smithereens and dishes out insulting remarks to a school authority. In a fit of desperation, he demands that Anita deletes the last picture they took together. Sensing a glimmer of hope to revert to their original time, Anita relents and agrees to aid him. By uploading a fresh picture, they successfully catalyze another temporal leap, but this time, they land in a starkly different realm. Anita has relocated from Paris to Sao Paulo and is now engaged to Fabricio.
The episode concludes with Anita and Joel confronting the ramifications of their actions. They have drastically altered the timeline, birthing a new reality that is both alien and unsettling. The looming question persists: will they uncover a path to reclaim their original timeline, or will they be compelled to embrace this novel existence?