It feels like kismet when Sarah Jones, newly relocated to Minneapolis after abruptly calling off her engagement, gets invited to join a group of women who share her same very common name. For years Sarah has received all types of correspondence intended for different Sarah Joneses, but now it seems that this mistake has given her the opportunity for an instant community.

What starts as a low-stakes meet-up called "The Sarah Jones Project" soon turns sinister when another local Sarah Jones is found dead, under suspicious circumstances, at the base of the downtown Minneapolis bridge. After fielding numerous calls from concerned loved ones ruling out their Sarah as the victim, the surviving Sarahs decide to take matters into their own hands.

Aided by the dead woman's nanny, a newly commissioned (and very handsome and eligible) FBI agent, and a cloistered nun with a complicated past, the motley crew of unlikely friends are determined to get to the bottom of the murder of one of their own.