Hatred is a Bad Advisor

Lera was struggling with the death of her grandfather, a renowned scientist. The only comfort was that he had asked his student — Arseniy, Lera's husband, to finish the last promising development. However, the files ended up with another one of his students — Egor, Arseniy's boss. Egor is by no means a genius scientist, but a talented intriguer, and he intends to claim Lera's grandfather's idea as his own. Learning this, Arseniy decided to thwart his former friend and punish him for his treachery. But just at that time, one of the employees at the company where Arseniy works under Egor's supervision was murdered. Is there a connection between these events?..