Being able to see ghosts and other supernatural spirits is a heavy responsibility. Prince Lee Rin (Jung Il Woo), like his father before him, discovers that he has the ability to see ghosts and other supernatural beings. Armed with his newfound abilities, Lee Rin becomes the leader of a group of night watchmen who patrol the streets from dusk to dawn to protect the people of the Chosun Dynasty against evil spirits. Moo Seok (Jung Yun Ho) is the best swordsman in the land who is the prince’s trusty bodyguard. But their loyalties will be tested when they both fall in love with the same woman – Do Ha (Go Sung Hee), the successor of the Ma Go tribe who seeks their help to protect the Baek Do mountain’s spirits. But Park Soo Ryun (Seo Ye Ji), the daughter of a court officer, will stop at nothing to marry Prince Lee Rin. “The Night Watchman,” also known as "Diary of a Night Watchman,"
After his mother is brutally murdered by the Triad in Thailand, Soo-hyun is adopted by NIS agent Kang Joong-ho, and he grows up with Min-ki like brothers. Min-ki and Soo-hyun both become NIS agents later on. One fateful day, Soo-hyun meets Ji-woo after last seeing her in Thailand when he was a child. They start dating. One day, Soo-hyun ruins a mission when the suppressed memories of the day his mother died surfaces in his mind. NIS Director Jung gives Soo-hyun an undercover assignment to infiltrate the Triad and Soo-hyun takes the job. Soo-hyun fakes his death and assumes a new identity to become a member of the Triad. With his fake identity and new name, he prowls the back alleys of Bangkok.
Baek Chan-Mi was a legendary black agent for the NIS, but, due to her excessive work, her subordinate died and she missed catching her intended target. Baek Chan-Mi was punished for that botched case and she now works in a cyber security team for the NIS. Baek Chan-Mi is then selected to go undercover on a case involving intellectual property theft at Korea's largest company.
Go Ni suffers an incredible loss when his mother and stepfather die because of Young Min. He later ends up in jail where he meets people who will change his life forever. Go Ni learns from a top tazza player in hopes of getting revenge.
Park Chan-Hong is an ordinary high school student. He has talent for writing and he gets pressured by his parents about his studies. Park Chan-Hong doesn't have any specific dreams. He is friends with Eom Se-Yoon, who attends the same high school. She is popular at school. Meanwhile, Heo Don-Hyeok is classmates with Park Chan-Hong. Heo Don-Hyeok is not interested in studying and he works to pay for his living expenses. One day, Heo Don-Hyeok saves Park Chan-Hong from a school bully. To pay for his rent, Heo Don-Hyeok asks to borrow 300,000 won ($270 USD) from Park Chan-Hong. Park Chan-Hong lends him the money, but that money was supposed to pay for his private institute tuition fee. After school, Park Chan-Hong now doesn't have a place to go. He begins to spend time with Heo Don-Hyeok.
Kang Soo is a loan shark that tries to get by day to day in his depressing reality. His father's abuse lead to his mother running away from home. Thanks to his father's crippling debt, he began to work under Hwang Tae Bok. Happiness wasn't something that was allowed to him. His only dream is to find his mother and live a happy life. However, this is impossible in his life. No matter how hard he tries, he can't escape the nightmare of his reality, and when he was about to give up on his life, he sees a flier asking, "Do you want to become happy?" With the smallest inkling of hope, he goes to the research center, so he can experience a bit of happiness. However, he learns that happiness comes at a steep price of 300,000 dollars. He decides to steal the money from Tae Bok. Will he be able to achieve happiness?
A new survival reality show, The Game of Queen Bee, invites you to the world of queen bees and their males where they compete for the prize money of 100,000 dollars in wild environments. The six queen bees, Monika, Jang Eun Sil, Jeong He Jin, Seo Hyun Suk, Shin Ji Eun, and Gooseul, must each lead three male participants in extreme survival missions and physical fights amid suffocating psychological warfare. The queen bees must lead their team members wisely and efficiently using the strategies and tactics they come up with as a team in order to win.