While visiting a museum hosting photographs of a popular artist, receptionist/aspiring novelist, Stacey Kim is mesmerized by one of the pictures titled "Woman with a Gun" - she is even more interested in the photo when she discovers that the woman is Megan Cahill, suspected of killing her husband, millionaire Raymond Cahill on their wedding night. The murder was never solved. With the photographer refusing to talk, Kim digs into a mystery that has spanned 15 years, contacting everyone involved and managing to uncover histories and secrets between them all.
There is a lot of jumping around within the 15 year span. But if you pay attention, this isn't a mystery you will want to miss.