in the eternal war against Apophis and he was born on the third Demon Day, or December 29. He would eventually marry his sister Nepthys and have a son with her, Anubis, but Anubis was raised by Osiris and Isis instead. After Ra retreated into the heavens and Osiris became the new Pharaoh of the gods, Set refused to stand for it, imprisoned his brother in a magnificent sarcophagus and relentlessly chased Isis who was able to rescue Osiris. However, Set blew Osiris into fourteen different pieces and although Isis managed to reconstruct her husband, she was only ever able to resurrect him as the Lord of the Underworld. Set was eventually dethroned by Horus in revenge and in time, would be imprisoned along with the rest of the gods by the House of Life. In The Red Pyramid, Julius Kane uses the Rosetta Stone to release Osiris and return him to his throne in the Underworld as a first step towards restoring the gods due to the increasing threat of Apophis. However, Julius inadvertently releases all five gods of the Demon Days, including Set who imprisons Julius and Osiris in a sarcophagus and begins draining them of their power. He also secretly possesses Amos Kane to get close to Julius' children Carter and Sadie, the hosts of Horus and Isis respectively, whom he sends various minions after, including two other gods. Goaded by his demon minion Face of Horror, Set decides to summon a storm that will destroy North America at sunrise on his birthday to increase his own power. Despite Set's machinations and having to avoid the House of Life, the Kanes manage to confront Set at his base, the Red Pyramid. As Carter fights Set, Sadie teleports the pyramid to Washington, DC through a portal, severing Set from the source of his power, the desert, and stopping the storm and his plot. Having gotten Set's secret name "Evil Day" from Nepthys, Sadie performs a spell to banish Set deep into the Duat, but sensing that something is wrong, looks into the rift that the spell opened and spots Apophis, the true orchestrator of the plot. Breaking the spell, Sadie uses the Feather of Truth to show Carter and Set Apophis in the sky and Carter kills Face of Horror who is revealed to be possessed by Apophis whose true plan was to use the Chaos energy generated