When a baby is brought into the hospital because he isn't breathing well, Detectives Benson and Stabler are called in because of the doctor's suspicion of child abuse. The doctor confirmed that the baby was given a large dose of cocaine, which caused him to become ill. The baby's mother admits to stealing the formula that she fed her baby from the family that she works for, the Pfeiffer's, which was how the baby came in contact with the cocaine. During the investigation they find that Derek Pfeiffer was using the baby formula to cover up the fact that he was importing drugs into the United States from Mexico while he was on business trips.
This is one of the first episodes of Law and Order SVU that I saw when I started watching the series. I really like the storyline and how the Detectives had to go undercover to investigate after their lead suspect was murdered in order to keep him quiet.