The series opens with Sweetheart, a skilled thief, completing her final mission for the enigmatic "Viper" organization, only to be thrust into a series of forced contract marriages with powerful men, primarily Edward. Their tumultuous union is marked by Edward's possessiveness and her fierce struggle for independence, complicated by a mysterious ring she protects. Trapped within Edward's influential family empire, she faces confinement and abuse, while Edward's obsessive ex-fiancée vows to eliminate any rivals. As Edward, also known as "Viper," emerges as a formidable protector of his wife (variously named Jia, Megha, Alice, Vera, Katha), he brutally interrogates threats connected to the "Viper" organization and "Beta Euphemia." He navigates corporate intrigue, family feuds, and dangerous deceptions, investigating his parents' mysterious deaths and uncovering long-buried conspiracies. Edward's relationships are further complicated by accusations of infidelity from Cynthia and a fake pregnancy scheme by "The Mistress," all while a "black box" holds crucial secrets. Edward is poisoned, leading to a mutual confession of forbidden love with Jo, but this is immediately threatened by Viper, who seizes control of an empire and reveals a long-held, obsessive desire for Edward. Operative Beta, also a hacker, pursues a secret love with Man 1 while decoding a "black box file" containing truths about mysterious deaths. Later, Edward's wife, Alice, is critically injured in a violent confrontation, awakening with amnesia linked to a brain chip removal, and struggles to escape their binding marriage. Edward attempts to rekindle their romance while embarking on a mission for a "root map." Meanwhile, Beta, a former mafia victim, becomes a vigilante seeking justice against "Wild" and discovers she is pregnant, while Edward "Viper" claims paternity of amnesiac Vera's unexpected pregnancy. Edward faces an assassination plot orchestrated by Man 1, and his wife, grappling with memory loss, confronts him about an alleged affair with Sinthia, proposing separation. The elusive Wild, deeply in love with Edward, actively protects his truth. Ultimately, Edward risks everything to rescue Katha from a deadly situation, only for her to regain her memory and discover their marriage was a sham, leaving her to question his motives amidst ongoing quests for justice, revenge, and the unraveling of deep-seated conspiracies.

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