The Curious sits in a restaurant called Zucco's, drinking milkshakes.
Keira, whose family owns Zucco's, is a vain young girl who loves taking selfies. Her responsible older sister Marcy is annoyed by her selfie habit, especially when Keira slacks off on the job at Zucco's. Marcy also thinks that her crush, Brock, is more attracted to Keira. Unhappy with how the day's selfies turned out, Keira searches online for "how to take the perfect selfie" and finds an app called Flaw Fader, which promises to "take the best of you." She shows it to Marcy, who is unnerved by the creepy music the app plays. Nevertheless, Keira loves the app and the photos she takes with it.
Keira starts experiencing blurry vision and requests for "gallery bids" from the app, but ignores it. Whilst she is at work, customers start screaming at the sight of her face. She rushes into the bathroom and, although barely able to see, recognises that her face is now almost completely blank. Marcy returns home angry that Keira has been texting Brock, but Keira explains that they arranged to go to a festival and bring Marcy to spend time with him - since Marcy doesn't use social media. Marcy is horrified to see the state of Keira's face and works out that it was something to do with the app. She goes online and finds dozens of reviews from people whose faces were all stolen by the app.
Marcy traces the app's IP to an abandoned building called "The Gallery." The girls break in and find many sentient faces displayed on the walls, including Keira's. They encounter The Hidden: a hologram of a sinister man with a skeletal face, who says the app captured a perfect image of Keira just like she wanted. He stores all the faces to be sold via the app. When Keira says she didn't consent to this, he says she did - via the app's terms and conditions, which she did not bother to read. Marcy hacks into the app and lowers the bid price on Keira's face, threatening to ruin every app The Hidden has ever made. He reluctantly agrees to let Keira go but says he won't give her another chance if her face shows up again on any app he creates. Marcy accepts his terms via a message on the app, and the faces on the walls disappear.
Keira is happier now that she doesn't have to take any more selfies, and Brock asks Marcy on a date. However Marcy remembers her deal with The Hidden. She reads the terms and discovers she promised to give him both her and Keira's faces if they ever appear in any photo again. When she goes to try to warn Keira, she is unable to stop her father taking a family photo including both girls. Later, The Curious explores the now-empty gallery.
This episode contains examples of:
- Annoying Younger Sibling: Keira's little brother Sammy often steals her phone.
- Big Eater: The opening shows The Curious to have drunk several giant milkshakes.
- The Blank: The app steals the faces of those who use it, for the creator to then sell.
- Camera Fiend: Keira has a penchant for taking selfies.
- Downer Ending: Keira and Marcy will apparently both have their faces permanently stolen by The Hidden.
- Foolish Sibling, Responsible Sibling: Keira and Marcy respectively.
- Hell Is That Noise: The creepy tune the app plays, which will sound at random times whenever a gallery bid comes in.
- Missing Mom: Keira and Marcy live with their dad and grandmother; it's never mentioned where their mother is.
- New Media Are Evil: This is both part of the episode's moral, and the opinion of Marcy; who refuses to take selfies or use social media.
- Playful Hacker: Marcy is good at tracing IP addresses and breaking into each others' computers, usually for heroic purposes (helping Keira) although she contemplates taking down a rival company's website with a virus.
- Read the Fine Print: The app's terms and conditions do warn that it will steal your face. Pity Keira didn't read them. Marcy also falls victim to this when bargaining for Keira's face.
- Shared Universe: The episodes Trolled and Marti both reference Zucco's Pizzeria (although this Zucco's appears to primarily sell burgers.)
- True Art Is Incomprehensible: What The Hidden claims in relation to his "gallery."
- Vanity Is Feminine: Keira is both vain and very conventionally feminine.