Tower of Babel (2019)

Episode 4 (1x4)

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Woo-hyuk urgently arrests Su-ho as a suspect in Min-ho's murder. While interrogating Su-ho, Woo-hyuk hears from Su-ho about Min-ho's shocking past. Meanwhile, Woo-hyuk, who spent a happy time with the garden, is shocked when he receives the phone call that the garden left behind.