The heroes of the book follow the terrifying message of a talented scientist, obsessed with the idea of saving the Earth and humanity. The American professor and his resourceful companion are on a frantic search in the magnificent Florence, Venice and Istanbul. Are the efforts in vain... The novel is a constant escape and search: Dante Alighieri's hell, the Inferno, periodically rises before the reader, and not only in the lines of the "Divine Comedy", which serve as passwords, but also in the paintings of the greatest masters of the Renaissance.
