“Tables of Amon” and the Constellation Stone. The only artifacts of an ancient, mysterious, long-vanished civilization, in search of which the famous archaeologist Desmond Garrett once set out. However, neither he himself nor his employees returned from the sands of the Sahara... Did they die? They thought so for ten years. However, now Philip Garrett, Desmond’s son and student, suddenly receives secret information, from which it follows that his father is alive. There are people ready to sponsor a rescue operation. But in order to find the missing expedition, Philip and his friend and assistant Padre Boni must solve the mystery of the “Tables of Amon” and the Constellation Stone, and also find the way to the last refuge of the missing people - the legendary Tower of Solitude...