the episode begins with knuckels ordering flapjack around.Bubbie tells knuckels to stop ordering flapjack around but flapjack says its okay because he is a captain,and captains give orders.Bubbie questions that knuckels really is a captain but knuckels says he has captains papers.Bubbie wants to know where they are and knuckels says they are on a ship at the bottom of the ocean.They decide to go find them and while they are searching knuckels tells flapjack a fake story of how he got his captains papers.However,when flapjack and knuckels find the ship and have a look around flapjack finds out that knuckels failed.then the other members of the crew that sank come in and find flapjack and knuckels hiding in a barrel.Knuckels then tells the crew that the only reason he did not pass the test was becaus the captain was a jerk and that he hated him.But the crew tells him the captain loved him which makes knuckels tell real story and how he sunk ship.flapjack then asks the crew if knuckels can take a retest,which they let him do.However,the crew makes knuckels do all sorts of ridicoulious stuff that does not even have anything to do with the retest.After knuckels finds out he did that stuff for nothing he goes bizark and causes the ship to come back up to the surface.the captain then arrives on a rooboat and gives knuckels his captains papers for raising anchor.bubbie arrives and knuckels tells flapjack to put the papers in bubbies face because he is going to party as the episode ends.
Trivia
We finally learn that K'nuckles has got his Captain's Papers.
When K'nuckles(as well as his younger self) jumped and said "I'm Gonna to Party!" in the end, this was more similar to the cover for Bruce Springteen's Born In The USA.