Twenty-nine-year-old Charlotte Rosen has a secret: she’s a widow. Ever since the fateful day that leveled her world, Charlotte has worked hard to move forward. Great job at a hot social media analytics company? Check. Roommate with no knowledge of her past? Check. Adorable dog? Check. All the while, she’s faithfully data crunched her way through life, calculating the probability of risk—so she can avoid it.

Yet Charlotte’s algorithms could never have predicted that her late husband’s ashes would land squarely on her doorstep five years later. Determined to find meaning in this sudden twist of fate, Charlotte is drawn back into the company of her perfectly coiffed, and perfectly difficult, former mother-in-law—and her husband’s best friend, who seems to be a fixture at her side whether she likes it or not. But soon the discovery of a shocking secret forces Charlotte to answer questions she never knew to ask and to consider the possibility of forgiveness. And when a chance at new love arises, she’ll have to decide once and for all whether to follow the numbers or trust her heart.