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Ethan Cross is an ordinary food delivery rider struggling to survive in a city where money and power rule everything. His life changes forever when he risks his own to save a dying stranger from a violent assassination. Before taking his last breath, the old man slips a mysterious black ring onto Ethan's finger and calls him the "last heir." Within hours, Ethan becomes the prime suspect in the old man's murder. He loses his job, his reputation, and every trace of the ordinary life he once knew as powerful forces begin erasing his existence. When the ancient ring awakens, it leads him to a hidden vault beneath the city, where an artificial intelligence named Astra reveals a shocking truth: Ethan is the last surviving heir to the Dominion, a secret empire destroyed by betrayal twenty years ago. Now hunted by the ruthless Five Great Families, Ethan must complete the Seven Bloodline Trials to reclaim his family's legacy and uncover the truth behind its downfall. But every answer leads to a darker conspiracy, every ally hides dangerous secrets, and one of the people responsible for his family's destruction is still alive and closer than Ethan could ever imagine. To survive, he must become more than an heir. He must become a ruler.