This drama is a romantic comedy between an AI programmer and a recording engineer.

Moon Ha Won (Jung Hae In) is an artificial intelligence programmer who founded the company M&H. He is very serious about his work though he seldom gets angry and is known as being a kind person. Meanwhile, Han Seo Woo (Chae Soo Bin) is a classical recording engineer who has a positive and bright personality despite her family and social issues. She likes to solve math problems when she is feeling down.