Watch "Tyrant: Season 1" on Netflix Japan

Lee Guk-cheol loses his sight in a sudden car crash that killed his parents, but gains an incredibly heightened sense of hearing.

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Called by a man who claims he was ordered to kill his parents, Guk-cheol heads to the hospital with Cha Jeong-eun but is infected with a deadly virus.

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Guk-cheol is reborn as Kang Ki-tan and begins his new life. Byun Il-jae seeks out Gun-woo, the illegitimate son of the Dodo Group chairman.

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Now a member of the Dodo Group's research team, Ki-tan clashes daily with Gun-woo. A suspicious item is discovered in Ki-tan's bag.

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Gun-woo and Soo-yeon join Ki-tan in his search for a supposedly dead man. Byun is invited to dine with Chairman Do on the day of an important trial.

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After saving Byun from a tight spot at the trial, Ki-tan is summoned to Do Gwang-woo's office, where he comes to Byun's aid once again.

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Byun arrives from Korea and meets with the researchers. Hwang Jae-man and his daughter Ji-soo plan to make Ji-soo a by-election candidate.

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All the researchers are given positions at Dodo Group thanks to Ki-tan. Byun dislikes the newly promoted Moon Tae-Gwang and questions Ki-tan.

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Ok Chae-ryung starts to investigate when she suspects that Soo-yeon might really be Jeong-eun. Byun discovers a secret and plots against Gwang-woo.

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Gwang-woo tries to cover up the fact that T9 is a carcinogen, but a situation arises at the hospital when an exposed patient's condition worsens.

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Seong-ae proposes to Ki-tan that they cooperate in their investigations of Gwang-woo's dealings. Soo-yeon engages in covert monitoring.

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Soo-yeon and Gun-woo help a patient escape the facility. Seong-ae and Ki-tan work together to find Gwang-woo's money and manage to get Yang alone.

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Troubled by the truth about T9, Soo-yeon asks a lawyer to help Ji-hye. Ki-tan pretends to cooperate with Yang in order to find proof.

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Yang is arrested and Park's cell phone is handed over to the police. Shin-young learns the truth about her brother while shooting a commercial.

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Amid the scandal surrounding Gwang-woo, Soo-yeon puts up with mistreatment at the company. Suddenly, the chairman's wife shows up.

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Ki-tan sets his plan to bring Byun down in motion. As Soo-yeon works side jobs, Gwang-woo gives an order to his secretary.

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Ki-tan once again swears revenge against Byun, who moves forward with complete trust in him. Ki-tan gets back a part of the hospital sale amount.

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Although he and Ki-tan both survive, Byun wakes in the hospital to find he has lost everything. Gun-woo sends Soo-yeon's colleagues to bring her back.

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Soo-yeon stays late at the office with Gun-woo and gets a call from Ki-tan. Byun hears Ki-tan calling Soo-yeon by the name Jeong-eun.

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Byun is admitted to a psychiatric hospital, but Ki-tan keeps a close eye on him. Gun-woo and Soo-yeon begin to grow closer as they work late hours.

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Now back with the Dodo Group, Ki-tan goes to meet the developer of an influenza vaccine who has made off with the formula.

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Soo-yeon tries to clear the false charges against Ki-tan after he is sentenced. Ki-tan suffers violence at the hands of Gwang-woo in prison.

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Believing that Ki-tan has the formula, Gwang-woo enlists his mother to get them both out of prison. Ki-tan falls into a trap.

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Ki-tan reunites with Soo-yeon after escaping from Jo Ki-ryang's clutches. Soo-yeon tries to obtain the formula to save Ki-tan.

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Soo-yeon suspects that her brother was killed by Byun, but Gun-woo is powerless to do anything. Ki-tan continues his maneuvering.

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Ki-tan is comatose after taking a bullet for Jo, who brings him to China to save him. Gun-woo speaks to Byun about a new drug partnership.

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One year after the chairman's wife took over for him, Soo-yeon works as a lawyer and plots revenge against Byun. Ki-tan regains consciousness.

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Ki-tan is put in charge of business in Korea and looks to Moon and Soo-tak for help. Seong-ae reports to Ki-tan on Chae-ryung's suspicious activity.

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Ji-soo and Byun's adulterous relationship is made public as Byun is running for office. Gun-woo camps out with Soo-yeon and others for work.

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Ki-tan has no memory of Soo-yeon, but something comes over him when he sees her. Byun realizes he will lose the election and vows to step up his game.

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The contract is postponed after Ki-tan is overcome at the sight of Soo-yeon's necklace. Gwang-woo's mother holds a board meeting to help him.

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Soo-yeon wakes up in the hospital but can't get her mind off Ki-tan, which vexes Gun-woo. Byun embarks on a dangerous strategy to win the election.

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Soo-yeon agrees to allow Ki-tan to undergo hypnosis again, causing him to lose all his memories of her. The two join together to have their revenge.

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While Gun-woo follows Soo-yeon, Chae-ryung reports to Moon that she has been taken. The cause of Chairman Do's condition is discovered.

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Byun suspects a traitor after he is arrested on suspicion of violating election laws. Gwang-woo and his mother put pressure on the shareholders.

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Soo-yeon prepares for the trial after being appointed special prosecutor while Byun plots to gain an acquittal. Ki-tan sees Soo-yeon with Gun-woo.

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Byun is sentenced to prison on Chae-ryung's testimony but plans to file an appeal. Ki-tan sets his sights on his next targets.

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Rivals clash as the shareholders' meeting drawing closer. Byun racks his brains in prison trying to figure out a way to bring down Ki-tan and Gun-woo.

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Moon manages to avoid Ki-tan's question about his relationship with Soo-yeon. Gun-woo searches for a way to win Soo-yeon's heart.

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Ki-tan learns that Gun-woo planned the attack on himself. The imprisoned Byun is handed something by his father-in-law Jae-man.

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Wary of Jae-man winning the presidential election, Ki-tan decides to ratchet up the pressure on the Dodo Group and heads out to make a deal.

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Gun-woo proposes to Soo-yeon, but she doesn't give him an answer right away. Ki-tan works to buy up Dodo Group bonds in order to bring down Gun-woo.

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