The first season of the Russian detective mini-Series «The Fibonacci Mystery», which can be watched online in our internet cinema with free access, consists of two episodes and tells the story of strange events that begin to occur in the life of a mathematician, all connected by a sequence based on Fibonacci numbers. At first glance, Olga seems to be a happy person: she loves her job as a mathematics teacher and has a beloved husband, Igor. Everything changes when she receives an anonymous letter revealing Igor’s infidelity. Olga learns that the message was written by her colleague, but he is murdered before he can answer her questions. Later, strange events begin to take place, and Olga’s mathematical mind detects a certain pattern: everything that happens is connected by the sequence of Fibonacci numbers. Olga intends to conduct her own investigation and find the person who is trying to destroy her life.