When the decomposing body of sexually molested five-year-old girl is discovered, Detectives Benson and Stabler's investigation leads them to the painful reality that they are searching for a serial pedophile as they race to save the life of his latest victim. As the mother of the missing girl frantically awaits news of her daughter's whereabouts, she must reconcile the fact that her own recent bout with addiction may have played a part in her daughter's fate.