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Part 1/9:

The Story of Park Changho: A Twisted Journey from Lawyer to Legend

The tale of Park Changho, also known as "Big Mouth," begins with a romantic dinner meant to celebrate an anniversary, but this seemingly innocuous event spirals into a series of betrayals and misunderstandings that define the trajectory of Changho's life. His meticulous plans to impress his wife, Miho, are met with her displeasure, as they are struggling under the burden of financial debt amounting to nearly 300 million won.

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Despite the marital tension, Changho's father-in-law expresses satisfaction with Changho's gesture, which softens Miho's stance momentarily. However, an unexpected phone call from a prosecutor investigating a murder case at a local university hospital leads Changho down a darker path. As he hastily departs the restaurant with an iced coffee, he succumbs to a dizzy spell and crashes his car, marking the beginning of a chaotic chain of events that will entangle him in much larger conspiracies.

The Legal Struggles of a Third-Rate Lawyer

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Changho, characterized as a brash yet poorly performing lawyer, faces mounting pressure both from his clients and within his marriage. In an attempt to avoid another embarrassing loss in court, he resorts to bribery—an act surprisingly supported by his father-in-law. However, when the judge he bribed is replaced, Changho fails miserably in court. His precarious financial situation coupled with familial discord compels him to confront his career and personal choices.

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In a desperate bid to find stability in his life, Changho expresses a desire to become a divorce lawyer—a revelation that sends Miho into a fit of fury. Their relationship reaches a breaking point as divorce looms on the horizon. Soon after, the mayor of Gchen presents an opportunity that would change everything—a lucrative yet morally questionable involvement in a murder investigation.

Entering the Criminal World

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As Changho navigates through treacherous waters, he finds himself swept into a deadly intersection of crime and power. Initially reluctant, Changho is persuaded to act as a pawn in the mayor's scheme to frame corrupt officials for murder, engaging him deeply in a web of criminal activity. He investigates the suspects and comes across incriminating evidence—the dashboard footage of a murder captured on a camera linked with his own life.

With mounting pressures from all sides—from his enraged wife to the looming threat of the law—Changho is thrust into becoming the very criminal he once despised. An accidental discovery leads to his wrongful arrest on drug-related charges, and as he becomes embroiled in the infamous "Big Mouse" case, the lines between victim and perpetrator blur.

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From Inmate to the King of the Underworld

Plunged into the depths of Gut in Prison, Changho fights for survival amidst threats from inmates he once thought powerless. The transition from a downcast lawyer to the newly anointed "Big Mouse" occurs when Changho finds himself respected—and feared—among prison inmates after inadvertently defending himself against a brutal inmate. He soon realizes that a powerful criminal syndicate is much more than a façade; it has real influence, and to protect his loved ones, he must actively engage in a game of wits and power dynamics.

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As chaos erupts within prison walls, Changho leverages the criminal reputation he never sought, using it as a shield against those plotting against him. With each move, he gradually transforms into a master manipulator who possesses significant control over the criminal underworld, ultimately bent on vengeance against those who have wronged him and his family.

The Rise to Redemption and Justice

As Changho treads deeper into his new role, he begins to aspire for justice—not just for himself but for those harmed by systemic corruption. His wife, Miho, embodies resilience as she seeks to unveil the truth behind a murder case tied to a malevolent company engaging in unethical practices. Their paths become intertwined as they face powerful foes threatening their existence.

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In a climactic turn, Miho’s brave efforts combined with Changho's cunning lead to a public confrontation of the corrupt power structures epitomized by characters such as the mayor, Doha, and chairman Kong. The couple's fight to unveil the truth exposes the toxic underbelly of their society, exposing the deadly consequences of unchecked power and greed.

Concluding Reflections: The Evolution of Park Changho

The series closes with Changho confronting the brutal realities of his actions and the world around him, reconciling the legacy of his alter ego, the “Big Mouse,” with his deeper aspirations for justice. He strives to fulfill a promise he made to his late wife: to be a good and virtuous "Big Mouse" instead of a criminal mastermind.

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Ultimately, Changho’s story is a poignant exploration of morality, choice, and consequence. It warns against the seductive allure of power while simultaneously shedding light on the resilience of those who refuse to be silenced. In a stark reminder of the complexities of human nature, Changho’s journey challenges viewers to consider the prices paid in the pursuit of justice and love.

In a world laden with betrayal, ambition, and crime, the moral stands clear: navigating the murky waters of love and ambition without losing one's integrity can lead to the hero's journey that one never anticipated.