In Apalachicola, Florida, sinister things are afoot, as sinister things tend to be. Lt. Maggie Redmond is called to a crime scene on St. George Island, where she is met with the body of Gregory Boudreaux. The medical examiner calls it a suicide, but no one knows that Maggie has a horrible connection to the dead man. When Gregory's uncle, Bennett Boudreaux, the richest and scariest man in town, takes a sudden interest in Maggie, people start to wonder, Maggie included. Maggie knows he may suspect her of killing his nephew, but she finds herself slowly drawn to the man. As Maggie fights to help a young girl escape the clutches of a volatile drug dealer who'd love to see Maggie dead, she also struggles to hide her dark link to a dead man, and her burgeoning relationship with her boss, Sheriff Wyatt Hamilton. Unfortunately, secrets have a way of revealing themselves at low tide.