Undertow

A missing sister. A rigged murder scene. A system built to erase girls like them.

After being forced onto medical leave, Chief Ellie Cook is barely hanging on-juggling prescribed pills, a collapsing reputation, and whispered rumors about her dead sister Rosie... who might not be dead after all.

When a former NEXA operative turns up murdered with a photo of Rosie pinned to his corpse, Ellie is immediately kicked off the case. Framed evidence, media firestorms, and institutional silence threaten to bury the truth. But Ellie doesn't stop. She can't.

With only her off-the-books partner Alexa Mendoza and detective Jesse Tran to trust, Ellie launches a rogue investigation into Phase Blue-a secret program still eliminating survivors of state-funded trafficking. As bodies pile up, the system tightens its grip, and Rosie becomes the prime suspect.

Set against a storm-lashed Pacific Northwest winter, Undertow is a gritty psychological thriller about corruption, survival, and what it means to keep fighting when everyone thinks you're done.

For fans of Tana French, Gillian Flynn, and Megan Abbott.