Syujetnaya liniya skazki, Glavniy geroy-Petya Zubov uchitsya v 3-em klasse. On ne lyubit uchitsya i vipolnyat domashnie zadaniya, on lyubit otkladivat svoi dela v dolgiy yashik.
Odnajdi utrom v shkole on uznaet, chto stal starenkim dedushkoy. On rasstraivaetsya i, ne znaya, chto dalshe delat, bejit, kuda glaza glyadyat. A glyadyat oni v les, kotoriy rasspolojen vozle ix goroda.
V lesu on naxodit nebolshoy domik, gde lojitsya otdoxnut. Prosnuvshis on vidit, chto xozyaeva vernulis. Ix chetvero: dve devochki i dvoe malchishek, oni sidyat za stolom. Pete nochnie gosti kajutsya neobichnimi, oni viglyadyat sovsem detmi, no vedut sebya kak pensioneri.
I tut Pete Zubovu otkrivaetsya strashnaya tayna. Okazivaetsya eto ne shkolniki, a nastoyashie zlie volshebniki.
Peta podslushivaet ix i uznaet chto est odin- edinstvenniy shans vernut svoe detstvo. Dlya etogo on doljen nayti ostalnix jertv volshebstva i privesti ix v dom k zlodeyam. Odno uslovie-eto neobxodimo sdelat v polnoch, a esli opozdat, to process budet bezvozvratnim.
K schastyu Petenke udaetsya vse zadumannoe. On naxodit shkolnikov. Samoe udivitelnoe, chto vpervie v jizni shkolniki prishli bez opozdaniy.