The only person in the United Universes has the amazing ability to overcome interdimensional boundaries with the help of a simple “knife”. This rare quality predetermined the fate of Richard Left, making him a guide through other realities, more than once pulling researchers out of the most sinister worlds and hopeless situations. Successful and famous, he could not even imagine that another, at first glance, quite ordinary task would completely change his life. Historian Lis Ripline, a girl with lake-blue eyes that make men grab weapons and lose their heads - it was her who Richard had to return from medieval Eimork, snatching it from the hands of the warlike and loving Duke Logan Truslitt.