As Arm enters university, he is introduced to his peer mentor group, the Perfect 10 Liners. He unintentionally gets off on the wrong foot with his senior, Arc, after posting…

After making a big life decision, Jeong-suk goes on a getaway work trip with the ladies. But upon her return, she finds herself in a perilous situation.

Kwon Seong-su defiantly returns to town, showing no remorse in front of Jeong-suk. Meanwhile, Kim Do-hyeon delves into a mysterious old case.