The gang storms the Thunderdome, Chrissy hits the big red button, and every robot clone melts into glittery sludge. Zay’s mom gets vacuumed into her own machine mid-Karen rant. As the dome collapses, everyone’s phone pings with a new app: RateYourKiller. Default rating: 3.0 stars.

Lowest-rated teens start turning up dead with their score carved into them. Brett’s already down to 1.7 for “toxic masculinity.” Joshua begs for five stars on his podcast. The killer leaves him a one-star review stapled to his forehead.

The app now runs the entire school. Alyssa’s feet pics shoot her to permanent five stars. Brandon and Branden open a black-market review-boosting service. Brett tries complimenting everyone and still drops to 0.9.

Prom king and queen are whoever has the highest rating at midnight. Tiaras explode, runner-ups lose their literal heads. The killer live-streams the crowning with confetti made of fingers.

The class tries spamming the killer with fake five-star reviews. Killer responds by locking the school and turning it into a death maze where every wrong door drops your rating and your limbs.

Caps and gowns hide razor wire. The valedictorian’s speech is cut short by a literal guillotine. Chrissy finally hacks the app and finds the killer’s profile: blank photo, zero reviews, username “NobodyRememberedMe.”

The killer is the quiet kid nobody ever rated. He just wanted to matter. Brett offers him five stars. Kid smiles, hits accept, then detonates the bleachers anyway. Season ends at 0.0 average.

Three months later, the survivors are back for summer make-up credits because the school board ruled the massacre “an act of senior prank.” A new masked figure starts killing again, leaving report cards instead of stars.

The killer traps the gang in an endless Saturday detention that loops every time someone dies. Brett keeps trying to flirt with Erica; she keeps dying first. Zay discovers the only way out is perfect attendance.

Chrissy destroys the apps servers but the football team just won so nobody cares and everyone just screams victory and dog-piles Brett. Then the sky rips open like a bad Zoom background. The ground swallows the entire stadium. Last thing Brett sees is a new masked figure waving from the stands wearing a crown made of old hall passes.