An office investigative drama that depicts the ups and downs of teamwork between a cool-headed audit team leader and affectionate audit team members.

The series is about the office workers of Marketing Team 3 at the home appliance headquarters of Gaus Electronics—a multinational company. It highlights the highs and lows of corporate life, and love and friendship between the employees.

The drama tells the story of Yoo So-joon, who can travel through time by a subway. After seeing his future-self living miserably, Joon decides to marry Ma Rin in order to avoid that fate. As time passes, he learns to love her selflessly.

When a man in his 30s, Byeon Hyeok Jun, trying to escape the quagmire of debt and starts a super high-value but secretive part-time job leading to an unfolding of unexpected events.

This is a story about a girl which three insignificant men care deeply about. The men look up to the girl considering her to be an idol of their own. But one day, a new guy appears in her life.