Serene Andrews, a 16-year-old girl turns up at the FBI offices, claiming she may have been kidnapped 13 years earlier. When the team look into the case, they initially believe that she is mistaken, but a simple slip-up by the woman who claims to be the girl's birth mother leads them to think otherwise. The agents soon discover a network of shady adoptions, all connected to one man. Back in the office, Jack tells the team he has decided to move to Chicago. They are all shocked, but Sam is particularly devastated, leading Martin to realise the truth of Sam and Jack's past relationship.