The story begins in the XVIII century in the Grand Duchy of Lithuania. Anthoni Tyzenhauz, a well-known state figure and reformer, rules his vast lands and strives for the economic prosperity of his possessions. He invites various craftsmen and artisans to serve for him in order to develop crafts and industry.
One day, at a fair in Vilna, Tyzenhauz meets an Irish traveler and naturalist named Hans Sloane. Sloane, known for his work in botanics and natural philosophy, came to the Grand Duchy of Lithuania to study the local flora and fauna. Tyzenhauz, fascinated by his stories about Ireland and scientific discoveries, invites Sloane to stay at his court in Grodno.
Sloane, being not only a scientist, but also an expert in Irish folklore, makes a present to Knyaz Tyzenhauz: an ancient amulet – a four-leaf clover enclosed in a silver medallion. Sloane says that this amulet has been passed down in his family from generation to generation and brings good luck and protection. Anthoni accepts the amulet with gratitude and begins to carry it with him all the time.