Seo Woo-jin / age: 27, News journalist - actress Sohn Ye-jin
After undergoing the grueling first years as a cub reporter in the society newsdesk, she realizes that life isn't a piece of cake. But after finishing a year of covering criminal cases, she is reassigned to the culture newsdesk and finds herself getting closer to her dreams of appearing on the 6 o'clock news. Full of hopes for her career, she also finds more time to relax. But when Oh Tae-seok, a reporter who was banished from the newsroom after clashing with the higher-ups, returns from his exile in a small town TV station, her dream is shattered. Woo-jin is sent back to the society newsdesk and returns to her days as a beat reporter. She is then saddled with the duty of training cub reporter Lee Soon-chul, who is a conservative type. But she finds the strength to rebound and channels her anger into fighting back and becoming a hard-hitting investigative journalist.

Oh Tae-seok / age: 33, Seo Woo-jin's mentor - actor Ji Jin-hee
Winning the journalism medal for three consecutive years, he is a true reporter who will hunt down a story like a pit bull. But his independent streak ends up putting him at odds with the higher-ups. His abilities as a journalist are highly regarded by everyone and the network cannot fire him for his disobedience because they would lose him to a rival network. So his bosses try to keep him on a tight leash while the younger news staff trembles in fear whenever he's in the newsroom. Three years ago, he wrote an article that became highly politicized and led to a big quarrel with his superiors, which ended with the network taking disciplinary action against him. He was subsequently relegated to a dead-end job at the network's local TV station. But when the society newsdesk starts to falter, his former bosses call him back to improve the quality of their operations and the second act of his career begins.

Ahn Joong-seok / Chief of society newsdesk - actor Ahn Seok-hwan
He grew up in the same town of his boss and competing with the chief of the politics newsdesk to become the next bureau chief. He used to advise journalist to only tell the truth no matter what but as he rises through the ranks of the newsroom, he makes compromises along the way to get where he wants.

Jung Sung-il / Chief of politics newsdesk - actor Choi Yong-min
He aspires to become the next bureau chief and then embark on a career in politics. Since he graduated from the same college as the bureau chief, he uses his connections to meddle in the society newsdesk affairs and bungle things up. As a journalist who covers politics, he analyzes all situations with a political perspective and tries to solve problems through political maneuvering.

Lee Joo-hee / Career journalist ranked behind Oh Tae-seok in the pecking order - actress Kim Bo-gyeong
As a single woman, she handles the internal affairs around the society newsdesk.
She has a secret crush on Oh Tae-seok ever since they joined the company in the same year. But before she could develop the relationship any further, Oh Tae-seok was sent to a dead-end job at a local TV station. When Oh Tae-seok returns to the newsroom, she feels an affinity with him and her emotions begin to stir again.
While she offers wise advice to the chief of the society newsdesk on important matters, she also tries to smooth out any rough patches between Oh Tae-seok and the chief that arise frequently.
After she detects that Oh Tae-seok has special feelings for Woo-jin, she begins to treat Woo-jin harshly.

Cha Myung-eun / Politics newsdesk journalist - actress Cho Yoon-hee
As a close partner of Woo-jin she worked with her on the same beat at the society newsdesk. She catches the attention of the chief of the politics newsdesk and is recruited to that bureau.
She always maintains her composure in any situation and treats superiors with respect and has a charming personality. But she's not well liked by reporters who are younger than her. She knows how to use her feminine charms to get what she wants and it's the secret to her success. She later competes for the coveted anchorwoman position against Woo-jin.

Lee Soon-chul / Cub reporter - actor Jin Koo
He is assigned as Woo-jin's assistant reporter but he graduated from the same college and class of '06 as Woo-jin. He is a conservative guy and a bit thickheaded. After trying to reposition his relationship with Woo-jin as equals, Woo-jin comes down hard on him by wielding her seniority as a weapon. Every since that spat, he treats her respectfully. As he assimilates himself into Woo-jin's world of journalism, he finds himself liking what he does.

Moon Jae-guk / Bureau chief - actor Lee Ki-yeol
He tries to track down sensational news stories that will raise the TV ratings of the news program and win points from the president. He doesn't care if viewers will hate his news show as long as he trounces the competition and brings in more advertisers.

Koh Byeong-chun / Detective - actor Lee Dae-yeon
A crafty detective at the police station where Woo-jin is a beat reporter.
He lost many opportunities to get promoted because every case he handled was swamped by journalists, who ended up muddling up his chances to crack the case. So he has bitter feelings against newsmen. He leads the legislation to remove the clubby pressroom from the police station, which is passed at the assembly. He tries to stop press leaks by harshly reminding his colleagues not to talk to the press until a case is solved. His actions put him at odds with journalists.

Lee Chun-ki / Detective - actor Lim Seung-ki
He has a close relationship with Woo-jin and even considers her as someone on his team. He provides her with important leaks. He has a crush on Woo-jin and this makes him the butt of many jokes at the precinct.