Synopsis:
While investigating several bank robberies, Olivia, Walter and Peter find one of the suspects trapped inside a vault wall, as if it wrapped itself around him, and shot dead. Walter realizes that the thieves have figured out a way to defy the law of physics with the ability to pass through solid objects, and that they are after something of his that he can't remember. As the investigation unfolds, the situation gets worse when Olivia is ambushed and kidnapped.