Diablo III

Story

The player character, known as the Nephalem, arrives in New Tristram to investigate the fallen star. The Nephalem rescues Cain at Leah's request and discovers that the fallen object is actually a human. The stranger has no memories except that he has lost his sword, which has broken into three pieces. Although the Nephalem recovers the pieces, the witch Maghda takes the shards and attempts to capture Cain to force him to repair the sword for her own purposes. However, with an uncontrolled show of force, Leah forces Maghda to flee and kidnaps the stranger instead. Cain, dying from Maghda's torture, uses his last strength to repair the sword and instructs the Nephalem to return it to the Stranger. The Nephalem rescues the Stranger and returns his sword to him, whereupon he regains his memories. The stranger then reveals himself to be the fallen angel Tyrael. Disgusted by the unwillingness of his fellow angels to protect humanity from the forces of Hell, Tyrael shed his divinity to become a mortal and warn Sanctuary of the arrival of the demon lords Belial and Azmodan. To avenge Cain's death, the Nephalem pursues Maghda to the city of Caldeum, which is controlled by her master Belial. The Nephalem kills Maghda and rescues Leah's mother, Adria. Adria tells Tyrael and the Nephalem that the key to stopping the demons is the Black Soul Stone, which can capture the souls of the seven lords of Hell and destroy them forever. To obtain the Black Soul Stone, the Nephalem resurrects the mad Horadrim Zoltun Kulle. Kulle reveals the hiding place and completes the unfinished Soulstone, but is killed by the Nephalem after trying to steal it for himself. The Nephalem kills Belial, traps his soul in the Black Soulstone, and frees Caldeum. While Leah studies in Caldeum's library to find out more about the Black Soulstone and Azmodan, she receives a vision from Azmodan, who tells her that he is sending an army from the ruins of Mount Arreat to take the Black Soulstone for himself. Tyrael, Adria, Leah and the Nephalem travel to Bastion Keep, the only line of defense between Azmodan's forces and the rest of Sanctuary. While the others stay behind to protect the Black Soulstone, the Nephalem advance from the keep into Mount Arreat. The Nephalem kills Azmodan and locks his soul in the Black Soulstone. But Adria betrays the Nephalem and takes the Black Soul Stone with the souls of the seven demon lords. She reveals that she was Diablo's agent from the beginning and that Leah's father is the Dark Walker who fathered her when she was possessed by Diablo, making her the perfect vessel for the demon's physical form. By using Leah as a sacrifice, Adria brings Diablo back to life. Carrying the souls of all the lords of Hell, Diablo becomes the "Chief Evil," the most powerful demon of all, and begins his assault on High Heaven, which the defending angels are no match for. Tyrael and the Nephalem follow Diablo into High Heavens, where the city is under attack. The defending angels warn the Nephalem that Diablo is trying to reach the Crystal Arch, which is the source of all the angels' power. To prevent Diablo from corrupting the Crystal Arch and completing his victory over High Heaven, the Nephalem confronts and defeats him. While Diablo's physical manifestation is destroyed, the Black Soulstone falls from High Heaven and appears to still be intact. After the battle, Tyrael decides to rejoin the High Heavens, but to remain as a mortal in order to form a lasting alliance between angels and humans.