Mary is reunited with FBI agent Mike Faber, with whom she worked (and clashed) previously. This time the focus is on a new protected witness, Natalie Vickers, who assisted in a real estate housing scam that the FBI is investigating. Despite Natalie's entry into the WITSEC program, both Mary and Faber have their doubts about Natalie's commitment to the program when she seems to have no questions about how it will work - concerns that only deepen when she disappears and then reappears without explanation.