“Back to the Future”, you say? “Back to your probability” is a much more difficult task! And Matvey will have to solve it alone - after all, it all started late in the evening, when he left the house for a minute and came across local hooligans... That Monday did not go well at all: the Internet was turned off in the morning, they left him at school after classes, and then his mother was dumbfounded by the terrible news. someone else's girl will now live with them! How could such a day end? Fleeing from three bandits who dream of taking Matvey’s phone; a trip on a half-empty bus to the outskirts of the city; a desperate attempt to hide in an abandoned concrete pipe. And ending up in an alternative universe, where no Matvey Dobrovolsky exists, but instead a girl named Miloslava! There is nowhere to wait for help: who will believe in a fairy tale about a seventh-grader lost between worlds? Neither teachers, nor classmates, nor parents, nor friends (which Matvey doesn’t have anyway). Is it the strange Venya Vatrushkin who always gets into trouble? This is someone who understands fantastic plots! Victoria Lederman understands fantastic plots no worse than her hero, and the new story “The Theory of Improbabilities” is an excellent example of a fascinating, modern and unobtrusively instructive work. The writer’s previous books are “May Calendar”, “There Will Be No Lessons”, “Only Eleven, or Shura-Mura in the Fifth “D””, “Vasilkin Will Go to the Blackboard!” – became bestsellers among readers of primary and secondary school age.