In the temple of Abydos, an acacia tree is dying. And its death threatens all of Egypt. For this is no ordinary tree: it sprang forth from the tomb of the god Osiris, the first ruler of Egypt, as proof of his triumph over death. The great pharaoh Sesostris III immediately joins battle against the invisible enemy who wishes to lead Egypt to her doom. But unknown to Sesostris, within his closest circle hides a traitor, a man who dreams of power and glory, a man who will sell himself to the powers of darkness in order to achieve his aim. A young apprentice scribe, Iker, becomes an unwilling player in this mystery. Kidnapped by sailors who refer darkly to a 'state secret', Iker does not know who is trying to kill him, nor indeed who is trying to protect him. Haunted by a vision of a beautiful young priestess, Iker senses that someone is guiding or manipulating him, and that he has set out on a road whose end he does not know. Will the two of them, Iker and Sesostris, the weak young boy and the great man of power, succeed in preventing Osiris from dying for the last time, thereby saving Egypt?
Despite the pharaoh Sesostris III's determination, despite the combined efforts of his generals who are searching, in vain, for the culprit, despite daily prayers and the devoted care of the queen and the seven priestesses of the goddess Hathor, the beautiful acacia tree of Abydos is dying. But the most mysterious of the priestesses, the one who haunts the nights of young Iker the scribe, has an idea: to save the 'Tree of Life', a new pyramid must be built at Dachur, dedicated to Osiris. Sesostris agrees, and work is set to begin. But what Sesostris doesn't know is that a triple conspiracy has been hatched against him. On the one hand, the Herald, the bearded devil who preaches to the desert tribes, has decided to seize power by having the pharaoh murdered. On the other, at the king's court, an ambitious, thieving traitor has only one solution: to get rid of his master. Finally Iker himself, deceived by appearances, believes that the moment has come to settle his scores. The conspirators have only to await their opportunity ...
The young scribe Iker has finally realised that, in pursuing Pharaoh Sesostris with his hatred, he chose the wrong target, and that the real enemy is elsewhere. The enemy, the one who is attacking the Tree of Life at Abydos, is in fact the Herald, that baleful individual who is rallying troops on the borders in order to invade Egypt and annihilate her. Now, Sesostris has just entrusted Iker with a particularly dangerous mission: to enter Canaan and discover the Herald's lair ...Who can save Egypt now? Sesostris, who is constantly faced with savage assassination attempts? Iker, who is fighting on a thousand fronts to prevent the traitor from succeeding? Or the beautiful priestess Isis, who perhaps - deep in her heart - will find the means to pacify the spirit of the Nile?