When hitchhiker Frank Schroeder (a pre-Hawaii 5-0
Jack Lord) gallantly saves a young Mexican girl named Teresa (
Pilar Seurat) from being sexually assaulted, she gratefully tags along with him on his Eastward journey. What Teresa doesn't know is that Frank is a triple murderer who for several days has been eluding a nationwide FBI dragnet. The girl is also blissfully unaware that her travelling companion is planning to pull off a million-dollar diamond heist--and to kill anyone who has the bad luck to get in his way. ~ Hal Erickson, All Movie Guide