After his girlfriend's murder in Seoul, Tang Shuo joins detective Shin Jun-hyun to solve a series of locked-room murders. Though they catch a suspect, he suspects a larger scheme. With help from a journalist and a student, he stays in Seoul, using sharp deduction to uncover the true mastermind.
Episode 1
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Episode 2
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Episode 3
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Episode 4
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Episode 7
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Episode 10
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Episode 14
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