She took an oath to save lives-now she'll break it to avenge one.When the system fails, one woman will stop at nothing to expose the truth.Dr. Serafina Cardella is a respected forensic pathologist and devoted mother. But behind her professional calm lies a storm of grief-and a burning need for answers. After the murder of her husband, a former Special Forces soldier turned elite security consultant, Serafina stumbles upon a dangerous conspiracy: a covert operation known only as HELIX.The deeper she digs, the more sinister the truth becomes. Powerful institutions, manipulated data, and disturbing human experiments all point to one conclusion-her husband didn't just die. He was silenced.With the help of her FBI-agent brother and her husband's closest allies, Serafina must navigate a deadly path, protect her sons, and outwit the powerful forces determined to stop her. But the cost of truth is steep-and some lines, once crossed, change everything.Gripping, emotional, and packed with suspense, Beneath Her Oath is a psychological thriller that will keep you up at night and leave you breathless by the final page. Perfect for fans of Lisa Gardner, Karin Slaughter, and medical thrillers with a fierce female lead.