Yoo Eun-ho, a single dad armed with perfection, becomes the secretary of Kang Ji-yun, the CEO of a popular headhunter company, who doesn't do anything except work.

Min-soo's fiancee suddenly admits that she is allergic to dogs. Now the guy's best friend, the golden retriever Rooney, needs a new family. With the help of his cousin and social media, Min-soo starts looking for a new home for Rooney.