A terrorist attack at the construction of an oil pipeline across the Caspian gave special services a hard task. Not only was the pipe-laying vessel blown up, along with an auxiliary dry cargo ship, but there was also a threat of another explosion. For the mission, they sent trusted fighters—the unit of the senior lieutenant of naval special forces, Sergey Pavlov, nicknamed Polundra. He went to the Caspian and soon discovered a saboteur. The saboteur, in an underwater diving suit and mask, was planting mines on the ship’s hull.
However, it turned out the saboteur was a blonde beauty…