In an attempt to save his marriage, A firefighter uses a 40-day experiment known as "The Love Dare".
In Albany, the marriage of Caleb end Catherine Holt is in crisis and they decide to divorce. However, Caleb's father, John, proposes that his son delays their separation process for forty days and follow a procedure called "The Love Dare" to make them love each other again.

Firefighters Keller at work , remember the advice of his predecessor left him : " Never let your companions fall behind you . " But in his family life , when you need to quarrels and conflicts in the marriage cooling when Keller was believed their own set of criteria . Just experienced the seventh year of their marriage life , Keller and his wife Catherine are invariably identified Catherine once said that sentence - her hope that she will never end this marriage . Catherine is the public relations director of a local hospital , she and her husband are not able to understand the pressure in their work with each other . Among the day-to-day bickering about work , money and housework , the two of them had to admit: that the marriage has come to an end . While the couple embarking on the process of their divorce proceedings , Keller 's father felt compelled to adjust their contradictions , he persuaded his son to try with Catherine to attend a based on a book called "Challenge love " as long as the journey of forty days of trial . Keller read the works of the same name and the test , try to understand what is called unconditional love . However, for the firefighters to save his marriage is not already too late ? His job is to save the lives of others , and now he is facing the most difficult of his life a work ─ to save his wife's heart .