Being the top man on the job doesn't always mean you know what you're doing, especially when you're trailed by danger every minute...

Tan Du-Ho, who is the top Special Agent in his lead, gets a letter at his doorstep on a Saturday morning, saying his best friend, Kuk Sung-Hyo, has been kidnapped and an expensive diamond stolen from a museum. In the letter, the villain says if he, Du-Ho, can't get to them in one week by the clues they've set him in time, they'll all be destroyed. With the help of his two other friends, will Du-Ho be able to save his prizes before the end awaits? 

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In this original action-mystery novel set in South Korea, written by Alison W., comes a risk when faced with a life-or-death situation, that you must look at every clue and detail right in order for you, and maybe some others, to survive to tell the tale...