A Pledge to God is about how two married couples will do whatever it takes to save their children. That's without taking into account that they'll leave ethics and morals to one side in order to do it.

Seo Ji Young is an anchorwoman and talk show host who is also fiercely devoted to her children. Meanwhile, Kim Jae Wook is the heir to a large architecture firm who is willing to lay everything on the line and stand up against his family in order to protect his children.