The story focuses on Visually impaired but nonetheless lethal bounty hunter Cheng Xiazi who happened upon the assaulted Ni Yan, the lone survivor of a brutal massacre that claimed her whole family.
Followed by Ma Seok-do, who heads to a foreign country to extradite a suspect. However, he discovers additional murder cases and learns about a killer who had committed crimes against tourists for many years.
In a prison where inmates are fed on a descending platform, those on the upper levels take more than their fair share while those below are left to starve on scraps, and one man decides to change the system.
Hint: The password should be at least eight characters long. To make it stronger, use upper and lower case letters, numbers, and symbols like ! " ? $ % ^ & ).