A dead baby is found in a gutter, sending the detectives on a hunt for its mother. She too turns up dead, and the clues point to a dermatologist whose DNA happens to match the evidence in a cold case of child molestation. Casey Novak, the ADA newly assigned to prosecute SVU cases, butts heads with Benson and Stabler over their handling of these murders. Though she has the blessing of DA Arthur Branch, she is still unsure of whether or not she is the right person to take Cabot's place.