Heart Signal is a dating show that has been successful in all three previous seasons. Now, it’s back with its fourth season to make your heart flutter. Young and beautiful men and women will stay at the Signal House for a month. At the Signal House, they will express their feelings to each other and find the one they want to be together. Every time a resident comes in, the panelists fall for their charms. Yoon Jong Shin, Lee Sang Min, Kim Ea Na, Kang Seung Yoon, Mimi, and Kim Chong Ki appear as panellists, spectating the development of their relationships.