The Varyag Empire is a giant iceberg, even the top of which is always under water. The beholder has huge amounts of money, enterprises, holdings, and companies at his disposal. "Russian Ark" is one of them. It was around her that the interests of foreign intelligence services, high-ranking officials, and agents of influence intersected. The head of the company's security service, Zakhar Markelov, is an experienced counterintelligence officer and knows how to not only defend himself, but also attack. But what to do if the company’s safe is hacked, the CEO has disappeared, and there is a “mole” working within the company’s structure? Zakhar turns to Varyag for help...