The temperature of 37.2 degrees Celsius is when the body is most suited to fall in love. And at the pirated radio frequency of 37.2, a man known as DJ Captain (Yoon Gun) hosts an underground show called "Pirates Radio," where listeners call in to get all kinds of advice about love and relationships.
Ahn Nae Sang and Yoon Yoo Sun are middle aged husband and wife. When his business goes bankrupt, this couple moves in to her brother's house and the conflict starts.