The Secret of Cape Pitsunda

Year 1916, the height of the war. The Russian command learns of an unheard-of audacity — in the quiet Abkhazian bay of Myussera near Pitsunda, the Germans have set up a secret base for their submarines. The Ottomans, along with local traitors, provide the pirates with complete support: fuel, supplies, and peace. From here, the submarines go out to hunt, sinking Russian ships.
In order to eradicate the enemy nest, State Counselor Lykov is sent to the site with his loyal assistant Azvestopulo. The detectives have an audacious plan: under the guise of shrewd traders hiding deserters from the front, to gather a team of thugs and strike at the base from within.
Gathering a band of desperate soldiers and criminals under their banner, the detectives set out on their mission. However, a surprise awaits them at the location. There is no base as such, just a warehouse packed with everything necessary for underwater warfare. Lykov manages to track down a submarine that has surfaced for recharging. Here it is, the prize! But will Lykov and his motley crew deal with the warehouse's guards and the elusive submarine, or will they themselves fall into the crafty traps set by the enemy?