Lice plot
When a classroom is shaken by a student's terrifying meltdown, a nearly invisible parasite spreads through the halls, instantly turning teenagers into maniacs. Amid the chaos, Principal Van struggles to maintain control. Burned-out science teacher Mr. Shanker is the only adult trying to make sense of the madness and discovers evidence of a government experiment gone wrong. Outside the quarantine rooms, Detective Sikorski tries to contain the outbreak before it consumes the entire city.