Shh! It's a Customer's Secret (1)

Summary

With Kwak Min Soo in the grasp of law enforcement, the situation is turned on its head when someone gets through their safe walls. An old man finds the suicide of his friend, but nothing is as it seems.

Guest stars

• Hong Kyung-in as Na Hyung-joon
• Kim Hong-pa as Eo Soo-yul
• Yoo Seung-mok as Na Hong-soo
• Kim Ki-nam as Yang Choon-byung
• Ahn Se-ha as Kwak Dok-ki
• Mi So-yun as Ha Yi-sun
• Na Seok-min as Dispatcher
• Kwon Hyuk-hyun as Jeon Yong-sik
• Kwon Chan-min as Dispatcher
• Kim Jin-ah as Song So-hee