Zephyr is the last human fighting evil in a world abandoned by the gods. After he is slain by Tartarus, the Demon Lord, all of humanity seems lost. However, much to the sinister amusement of the gods, Zephyr is reincarnated and sent ten years into the past to try and save humanity. Can Zephyr finally have his revenge against Tartarus and save the woman he loves, or is he doomed to repeat the past? Zephyr and his rival turned ally Ned are deep in the deadly Tomb of the Fallen Princess. What should have already been a dangerous dungeon raid has become even more volatile, because Tartarus worshippers have infiltrated the team. Advance Guard Captain Mathias means to betray his twenty-year friendship with Raid Party Leader Lucius now that the apocalypse is on the line. Meanwhile, Zephyr strives to reshape his past with more risky power cultivation, this time contemplating the unstable but incredible power of a dragon heart.