Seva is an observant guy. But what else is left when life by the sixth grade has become unbelievably complicated—and you’re no longer a star, just so-so; and your best friend from childhood is shamelessly flirting with some seventh-grade basketball boy? And then Seva notices something suspicious. Classmates one after another start turning… into zombies. It’s as if they’re being replaced! And the class adviser begins behaving strangely too. There’s no help to be expected—apparently, it’s up to Seva to figure out what’s going on and save everyone. And it all started with brains in jars with formalin in the biology classroom…