Young woman visiting from Buffalo claims that her car was stolen outside a Manhattan convenience store with her baby still buckled in the backseat. Benson and Amaro get as much information as they can from the anxious mother and her boyfriend at the police station, while Fin and Rollins track their path from Buffalo for clues. When the parents' stories don't add up, the detectives must uncover what really happened to the missing baby, and the truth surprises everyone.