In the life of Masha Stikhareva, whom her loving husband affectionately called the Moth, everything was like in a rainbow dream: a caring husband, an adored little son and a job as an illustrator of children's books, which brings satisfaction and joy. But it’s no longer a dream, but the real world becomes a nightmare. I don’t want to live, there’s nothing left that makes me happy and fills life with meaning and happiness. There is only one unbearable desire that keeps Masha in this world - to get even with the scum who deprived her of everything, who consider themselves above the laws of man and God. Engulfed in the flames of righteous anger, the Moth is not afraid to burn and rushes into the thick of things to change both externally and internally, to become a formidable instrument of revenge...