When a U.S. Senator and his mistress are in an accident, he calls upon U.S. Marshall Lucas Davenport, who helped him previously, to look into the homicide which he believes was an assassination attempt. The case brings Lucas to Washington and puts him on a collision course with an old nemesis, Taryn Grant, who is attractive, ambitious, and just a little bit crazy -- and with a very real likelihood of a White House run. Working again with fellow marshals Bob and Rae, the team finds Grant aligned herself with some deadly military friends who will do anything necessary to derail the investigation, including targeting Lucas and his family.