Lera had a hard time with the death of her grandfather, a famous scientist. The only consolation was that he asked his student Arseny, Lera’s husband, to complete the latest promising development. However, the files ended up in the hands of another of his students, Arseny’s boss Yegor. Egor is far from a brilliant scientist, but he is a talented intriguer and intends to pass off Lera’s grandfather’s idea as his own. Having learned about this, Arseny decided to interfere with his former friend and punish him for his meanness. But just at this time, one of the employees of the company where Arseny works under the leadership of Yegor was killed. Is there a connection between these events?..