Pogue and Oosterhuis investigate when a young girl named Erica Warner is taken from in front of a local store, with her older sister Shannon as the only witness. While Oosterhuis questions Shannon, he can't help but see similarities between the two of them, because when he was 13 he once lost track of his little brother at a carnival for a few hours and felt responsible for years. The squad soon realises that Erica's disappearance as a lot in common with that of a young girl who disappeared three years earlier, and they're determined to find Erica and stop the kidnapper before he can take another young girl from her home.