Park Service Investigator Doug Fletcher moves to Padre Island National Seashore to investigate hazardous waste dumping during the Hurricane Harvey clean up. While orienting himself to Texas and the waste dumping investigation, Doug and his rookie partner recover a body from the surf. After they identify John Doe, they coordinate kidnapping and murder investigations with the Corpus Christi Police.

Doug's search for the waste dumpers takes an unexpected twist, putting him at odds with the local police, his boss, and the FBI. He struggles to define his fledgling romance with Jill Rickowski who's torn between her Arizona Park Service career or an uncertain future with Doug.