Mirabelle Adrien never imagined she would have to worry about her husband's loyalty—until the day she walked in on him with the one woman she had been told not to be concerned about. Her husband’s betrayal is both shocking and hurtful. Fortunately for Mirabelle, her best friend and boss, Bastian Avery, is New York’s top divorce attorney, and he takes no prisoners when it comes to avenging the woman he has loved since he was sixteen.

Ten months later, Mirabelle is doing just fine—until she receives an invitation to her ex-husband's wedding. To make matters worse, the woman he is marrying is the same person who caused their breakup. Determined not to let the event ruin her, Mirabelle decides to attend the wedding with Bastian by her side for moral support.

When Mirabelle and Bastian arrive in Ann Arbor for the wedding, they discover that her ex and his affair partner have spread their own story about the affair to his friends and family, making Mirabelle look like a vindictive, crazy ex-wife. Determined to set the record straight, she tells the truth to anyone who asks and offers to show proof to the doubters, all while reconnecting with her ex-husband's family and beginning a relationship with Bastian.

The drama intensifies and culminates in a wedding reception that proves Karma exists in the most dramatic and satisfying way possible.