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Hidden genius doctor Damian Mercer (alias Umbra) disguises himself as a beggar to evade global pursuit, only to receive a black card as charity from heiress Liana Lowell. He diagnoses her terminal "Yin-collapsed meridians," but three renowned doctors dismiss him.After publicly humiliating the trio, Damian is forcibly brought to the Lowell estate, where his golden needle technique saves Liana's life, shocking the medical world. Upon escaping, he's publicly humiliated by his fiancee Molly Sawyer and half-brother Rowan Mercer, who break off their engagement. He also discovers the Mercer family has grown arrogant after gaining a seat among "the Twelve Ascendant Elders of the Sanctum" through Damian's own subordinate, Left Sentinel of the Sanctum. Damian secretly orchestrates his revenge, announcing as "Umbra" that he'll attend the Mercer family wedding—causing a sensation.