The story of Cielo, a mother in search of her daughter, abducted by a criminal gang in Northern Mexico. As the authorities fail to offer support in the search, Cielo takes matters into her own hands. Cielo begins her own investigation and earns the trust and sympathy of Lamarque, an unconventional army Lieutenant working in the region. He agrees to help Cielo in her search, because her research data could be useful to his operations as well. Cielo's collaboration with Lamarque pulls her further into a vicious cycle of violence.