At a retrospective on the work of acclaimed photographer Kathy Moran, aspiring novelist Stacey Kim is fascinated by the exhibition’s centerpiece: the famous Woman with a Gun, which launched the artist’s career. Shot from behind, the enigmatic black-and-white image depicts a woman in a wedding dress standing on the shore at night, facing the sea. But this is no serene, romantic portrait. In her right hand, which is hidden behind her back, she holds a six-shooter.

The picture captures Stacey’s imagination and raises a host of compelling questions: Who is this woman? Is this a photograph of her on her wedding day? Does she plan to kill herself or someone else? Obsessed with finding answers, she soon discovers the identity of the woman: a suspect in a ten-year-old murder investigation. Convinced that proof of the woman’s guilt, or innocence, is somehow connected to the photograph, Stacey embarks on a relentless investigation.

Drawn deeper into the case, Stacey finds that everyone involved has a different opinion of the woman’s culpability. But the one person who may know the whole story—Kathy Moran—isn’t talking. Stacey must find a way to get to the reclusive photographer, and get her to talk, or the truth about what happened that day will stay forever hidden in the shadows.