Deployment point - Blind

Former GRU special forces fighter Yuri Yakushev and his battle buddies accept their former commander's offer to do a businessman's bidding - to find his friend who has gone missing. Together with their commander, they return to the North Caucasus, a familiar environment where their skills, fearlessness and complete trust in each other are once again in demand. But an unexpected turn of events gives rise to suspicions that they are being harassed, betrayed.
Is this "someone" really one of them...?