Inspector Lewis Erskine has a new partner, Special Agent Chris Daniels. The FBI men lead the bureau's investigation of the robbery of more than $4 million in cash and negotiable securities in Dallas. One lead is an ex-con who tipped Erskine that a big job was being planned. One member of the gang who pulled off the robbery had tried to recruit the ex-con but he refused. After the robbery, there is an attempt on the ex-con's life. Another clue is one of the robbery participants cut his hand and has a rare blood type. Erskine and Daniels criss cross half the country in pursuit of the robbers.