Pierce and Moretti undercover an international scandal while investigating the murders of a Bangladeshi diplomat and a Chicago reporter. Distracted by the case, Moretti struggles with preparations for her upcoming wedding to Donnie and turns to Pierce for help.

When Moretti goes missing the day of her wedding, Pierce and Donnie set off in pursuit of the runaway bride. They soon learn that Kate has been abducted by a dangerous person from Pierce's own past. Now, Pierce and Donnie must risk everything to save Moretti before it's too late.