Powerful mysterious customers entrust three friends with unraveling the secret of ancient amulets that can influence the course of history and make their bearers almost immortal. Travelers through times and worlds go back to the past, which is so similar to ours. The heroes will hunt mammoths, beat whales with ancient Eskimos, mine ore in the Chud mines, wander through the desert in the company of Jews who came out of slavery, fight in duels and participate in court intrigues. And all this is just to answer the question: how does the amulet work. And there is still the second half of the mystery ahead...