Enomoto Kei is a security "otaku" working for a security firm, devoted to improving the securities system on a daily basis. He is not an easy person to familiarize oneself with, always collected and calm, unapproachable, a maniac in Physics, Science, Architecture and profound in other basic theoretical foundation. He is certain and proud of the fact that there is no key which he cannot unlock. One day, Kei is asked to help reveal a mystery behind a locked room murderer. While he lacks any interest in solving the mystery, he is inevitably intrigued by the term, "Closed Doors" and decides to take on the position. He works side by side with Aoto Junko and Serizawa Gou, who are lawyers working at a major law firm. Junko is pure and forward, acting upon her instincts while Serizawa is a prideful elitist who sees time as money, and therefore, will not take on any job that is unprofitable. Possessing a vast amount of knowledge and acute insightfulness, Kei is able to unlock the closed doors and unravel the secrets leading to the solution. Never before has there been a drama focused solely on closed doors. It's an all new original mystery that will keep you guessing every week

The series follows a group of workers at a delivery/security guard agency, where the workday consists of ego clashes, inappropriate behavior and action-packed comedy.

Shek Chi Hong is an honest and kind person. To earn a living, Chi Hong aspires to be a chef in Man Long’s casino but he ends up becoming a dealer instead. After witnessing his teacher's death, he is more determined not to take up gambling. But somehow, he has no choice but to learn the gambling skills as it is part of the nature of his work. He goes through many turbulence in his life, losing many friends and comrades as well as love.

The story opens during the last days of the second Shogun, who has two sons, Iemitsu and Tadanaga. Iemitsu is the elder son and is expected to become the next Shogun. However, the real lion's share of the power is held by the Shogun. The Emperor, who belongs to the Noble class must approve the selection of a new Shogun. This rules governing behaviour for the Nobles are distinctly different from the rules for the Samurai. The main goal of the Nobles is to restore the true governing power to Japan to the Emperor. To accomplish this goal, the Nobles feel the more chaos the better. The Yagyu Conspiracy retells the one of the most exciting and intriguing chapters found in Japanese history...

Miyako participates in a 1 night and 2 days hiking tour of Mount Fuji. Ryoichi Nozawa is the guide for the hiking tour team of Miyako, Shintaro Kondo, Someno Aoyama and Ai Mitsuke. While hiking through Mount Fuji, Someno looks back and sees Miyako is crouced down and has her hands covering her face. Ryoichi tries to talk to Miyako, but she is frozen. Miyako sees the faint shape of person. Miyako realizes that she has a daughter named Natsuki.

Based on the book "Kanata no Ko" by Mitsuyo Kakuta.