Mary must protect a drug dealer's young son, who has been adopted by another WITSEC family, after the dad sues for custody upon his release from prison. Mary realizes the case is an attempt to keep the boy from testifying against his father's boss, but she has a difficult time proving it to the judge.

Marshall and Mary are stranded in the desert with a prisoner after hit men sabotage their vehicle, wounding Marshall in the process. Meanwhile, Jinx uncovers a painful truth about her past and vows, yet again, to clean up her act.