Returning home from their one year anniversary trip, Fiona and Annie discover that their poignant proposal video has been posted on YouTube and has garnered hundreds of thousands of hits. As some of the attention starts to turn vicious, Fiona pulls in an old friend, private investigator Jane Lawless, to help separate the idle threats from the potentially harmful. The situation spins out of control when Fiona and Annie are accused of murder, and as Jane makes her 24th investigation (after The Grave Soul), she learns some things that make her wonder whether they actually are innocent.