When the body of Gabrielle Garrett is found on Lake Mead on a Christmas day, the coroner rules it as suicide. However, her three sisters begin their own investigation, which leads them to Byron Lord and the dark Las Vegas underworld.

As two rival Godfathers view to take control of the city, a hot-tempered family member kills two relatives of the opposing family, breaking the "Truce of Honor". Now the war begins! As a young boxer seeks revenge for his fiancée's death, the streets become a real-life battlefield... to settle the score!