Keller (Kirk Cameron Kirk Cameron) is a firefighter, and Catherine (Erin Bethea) is the hospital's public relations director. Although they are all-powerful in their respective professional fields, neither of them can deny that their impulsiveness and immaturity led to the breakdown of their relationship and the breakdown of their marriage. After countless fierce, normal and frustrating cold wars, divorce became the only option for the two. Seeing young people suffering emotionally, John (Harris Malcom) decides not to sit idly by. He persuaded his son John to take Catherine on a 40-day trip called "Challenge Love" as a final effort to repair the relationship between husband and wife. Unexpectedly, it was in this seemingly hopeless journey that Keller realized the mistakes he had made, and he decided to restore Catherine's love and trust to him. However, in the face of Catherine, who had decided to go, could Keller's retention work?