Hook
Mara prices airline seats for a living. On a business trip, she notices that the e-ink tags in her hotel minibar keep changing. Water costs $4 at noon. At 2 a.m., after her pitch falls apart, the same bottle costs $19. The minibar is surge-pricing her, and the surge is her mood.
Escalation
- She's annoyed, but she's also curious about the engineering, so she starts testing it. Pacing pushes the cashews up $3. A 40-minute call with her mother adds $11 to the gin. A good night's sleep brings everything back to list price. The room's sensors are feeding a model that charges whatever her desperation will bear.
- The model turns out to be scarily accurate. The prices start climbing hours before she notices she's spiraling. She stops checking in with herself and starts checking the fridge. It's a better mood tracker than her therapist ever was, and it doesn't need her to say anything.
- She posts a thread about what she's found, and it goes viral. Guests start booking the hotel to 'get read.' People post screenshots of their Toblerone prices. A couple breaks up in the lobby over $60 cashews. The hotel doesn't hide the feature. It makes it the selling point.
- Mara extends her stay. She keeps extending it, ignores her job, and watches her prices rise a little every day. She's oddly proud of it, like a stock she believes in. Then she wakes at 4 a.m. and every tag in the minibar reads $0.00.
✦ Twist
She finally finds the vendor's pricing documentation she's been hunting for. Zero isn't a glitch or a discount. The model drops the price to zero when it predicts the guest won't be around to pay. As she gets to that line, someone knocks. It's the night manager, who was trained on what the zeros mean and came up the moment hers appeared. For weeks Mara read the fridge as a market. The fridge was treating her as a risk, and it worked that out before she did.
💡 The engine is a machine built to exploit people paying such close attention to its customer that it becomes the first thing to notice she's in danger, so a joke about overpriced snacks turns into a welfare check.