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Ryung officially becomes a member of the Wangsoori Subway Police and Ji Seok’s partner. Ryung gets into trouble from the start, because she sneaks into the tunnels. Meanwhile, an elderly man who delivers packages via subway becomes the victim of an assault. Ji Seok realizes that the package is related to criminal activities. While Ji Seok wants to hand the case over, Ryung acts before she thinks, as always.
Episodes
1Job Interview & Audition 2Going Home to Family 3Disciplinary Hearing 4Tracking Down the Grasshoppers 5Club Day 6A Petty Thief? 7Jealousy & Confusion 8Facing the Harsh Truth 9Getting Closer to the Subway Ghost 10The Hideout 11Going After the Grasshoppers 12The One that Got Away 13The Grasshoppers Are Behind Bars 14The Subway Ghost Reveals Himself 15The Subway Ghost’s Method 16Finally Catching the Subway Ghost