When the show begins, Dabney Calloway is doing what he's good at doing...blackmailing a couple guys. However, in this case, the blackmailer didn't read his clients right...he pushed the wrong guys and they kill the dirty crook. A short time later, Cannon is visited by Mrs. Calloway. She has no idea what's happened to her husband...nor does she have any idea what a dirty character he was. Cannon gets to the bottom of this...and quickly sizes up Dabney for what he was. Oddly, however, Mrs. Calloway's reaction when Cannon discusses this with her is unusual to say the least....and there's definitely more to the story.
This is a pretty mundane episode of "Cannon"...not bad but also not particularly memorable. Much of it is because the dead man was a jerk...and it was hard to care about the guy. But still...a mundane episode of the series is still quite good.