A North Dakota man dies in the hospital from an apparent heatstroke. When the coroner discovers the cause of death was poisoning, authorities launch a criminal investigation that leads them to a calculating killer with a multi-million-dollar motive.

A woman's sudden death is initially ruled a suicide, but when new information comes to light, a shocking conspiracy is revealed; investigators unravel a tangled web of lies, betrayal and jealousy to uncover the truth behind her murder.