Tatiana Bekesheva regretted coming to Siberia to excavate an ancient fortress—she couldn’t sort out her feelings for the expedition leader, Anatoly, who invited her here. Yet she turned out to be in the very place where three hundred years ago her distant ancestors met—Peter I’s envoy, Miron Bekeshev, and the Siberian princess Aidina! During the excavation, they accidentally found a rich burial. It seems to be Aidina herself!
Then something terrible began: the people guarding the discovered treasures were attacked, and Tatiana witnessed a quarrel between the archaeologist Fyodor and an unknown man who suddenly pulled out a knife and stabbed him. Could it be that Fyodor led the camp of the “black diggers”?
Tatiana remembered: her former fiancé asked that Fyodor be taken on the expedition!