 Newlyweds Carl and Jennifer Stone arrive at Phillips  Cafe just in time to witness a botched robbery in which the counterman is killed. Perpetrator Joe Norton permits the two to leave on the condition that they never tell anyone what they saw. Joe s brother Pete is dubious and sets out to find and silence the frightened witnesses for good. Carl Stone subsequently has an attack of conscience and provides Dan Mathews with an anonymous tip that leads to Joe Norton s arrest. Joe s alibi is shaky, but Dan is determined to use existing leads to find the Stones in order to make the case airtight. Pete Norton catches up to the Stones, but Dan arrives shortly thereafter and uses a ruse to lure Pete into the open.