sentences:  The story revolves around a Swedish scientist named Karl Markov working in the Soviet Union and his latest invention, an advanced nuclear fission control system which he wants to gift to the entire world.When the Russians intend to monopolize his invention, Markov intends to defect back to the West, but is held prisoner by the KGB.In order to force his cooperation, the KGB plots to kidnap his estranged daughter Nadia.