The film takes place in the dark forest, where there has been living a huge and incomparable animal - the flash, which can appear in the water, but also on land. If people live in harmony with it, it will bring us good luck and peace. But no one should pass on the secret or let foreigners see it. If they see it, they should not pass it on. Otherwise, the revenge will be flashing. Nevertheless, five urban youths who do not know the height and depth of the earth come here by coincidence, and they break this old precept. Terrible revenge unfolds one by one, no one can escape the spirit of the spell.