This is the third 690 made, returning from a fishing trip (probably to Cow Lake).
This is how they used to sell airplanes, back in the day (they probably still do)-- take the customer on a fishing trip to some out of the way place in Canada (or Mexico, or the Bahamas, depending on where you're based)-- they enjoy themselves, and get to see the utility of the airplane in reaching distant places quickly and easily.