Plankton is once again complaining about how he has no customers, with Karen being annoyed by the constant whining. Nat Peterson, instantly comes in and asks for a Chum Stick. Plankton at first thinks he is kidding, then Nat says he was serious, then gives Nat the Chum Stick. After Nat eats the Chum Stick, he says the Chum Stick was so good, he would come back the next day. Plankton is overjoyed at the fact, and brags to Karen, who is barely shaken by the fact (A possible clue that Karen is actually paying Nat.) Plankton decides to wait with a Chum Stick for Nat. Eight hours later, Plankton wakes up by the clock and realizes it's closing time, and concludes that it was not true that Nat was coming back. However, at that moment, Nat appears. Plankton gives him the chum he had been saving, which Nat thinks is perfect after he looks like it was a very appalling meal. Nat says he will come back the next day and the next week, telling Plankton he has a regular customer on his hands.
At the Krusty Krab, Mr. Krabs is bowling, using his money as the bowling balls and pins. Plankton appears, and Mr. Krabs tries to squish him with a spoon. Plankton assures Mr. Krabs that he doesn't need to compete with the Krusty Krab anymore since he now has a regular customer. Mr. Krabs laughs at him, and shows off all his customers eating Krabby Patties. Then Nat appears asking Plankton for another Chum Stick in front of Mr. Krabs. Nat carries Plankton back to the Chum Bucket, with Plankton mocking Mr. Krabs and insulting him. Mr. Krabs explains the situation to SpongeBob, and orders him to get Nat to eat food from the Krusty Krab and not at the Chum Bucket. Every attempt is unsuccessful, first when SpongeBob simply shows Nat a Krabby Patty, which Nat immediately doesn't like just by smelling it, secondly, SpongeBob fakes a trip off of a rock holding Nat and pretending the Krabby Patty is coming straight for his mouth, thirdly, SpongeBob transforms into Karen and pretends to give Nat a chum stick which is a Krabby Patty, he ties up and gags Karen so they won't notice him, fourthly, Mr. Krabs and SpongeBob trick Nat into going into a shortcut leading to the Chum Bucket which really leads to the Krusty Krab, they make chum Nat doesn't like. Mr. Krabs bursts into tears, saying that he cannot afford Plankton to have even just one customer. SpongeBob says that if he wants Nat to eat at the Krusty Krab, he will have to make chum as good as Plankton. This gives Mr. Krabs the idea to steal the chum recipe.
That night, Mr. Krabs sneaks into the Chum Bucket trying to steal Plankton's recipe but Plankton catches him with the spoon security system. SpongeBob then grabs Plankton and starts talking about irony of the situation, but Plankton then uses the spoon security system on SpongeBob. After Plankton reveals the name of his system, Karen shows, on screen, that Nat is heading for the Chum Bucket with a fortune. Nat comes back telling Plankton that the Chum made him sick twice, since Nat only pretended to like the food so Karen would pay him, SO that Plankton should stop his self complaining, Because of this Plankton once again feels miserable again, and realizes that he never had a regular customer. SpongeBob tells Mr. Krabs to escape, but he decides to stay and laugh at Plankton's misery, which enjoys seeing Plankton cry.
( ‣ ) Associated production music
( • ) Original music
( ◦ ) SpongeBob music
• ? - Sage Guyton, Jeremy Wakefield [title card] ‣Emotion Blues - Francois Fournet, Eric Gemsa [Plankton upset about having no customers] ‣Tympup A - Sammy Burdson, John Charles Fiddy [Nat asks for a chum stick] • ? - Nicolas Carr [Nat asks for a chum stick] ‣Background Blues - Otto Sieben ["You're kidding, right?"] ‣On the Beach - Kapono Beamer [Plankton waiting for Nat to come back] ‣Hawaiian Link (b) - Richard Myhill ["It's closing time."] ‣ ? [Nat appears] ‣Background Blues - Otto Sieben [Nat asks for another chum stick] ‣ ? ["It's perfection!"] ‣Background Blues - Otto Sieben ["How about I have another?"] • ? - Nicolas Carr ["Oh, my, this is amazing!"] ‣Verve - Jack Shaindlin ["At last I've got my revenge!"] ‣The Achterhoek Dances - Jan Rap [at the Krusty Krab] ‣Drama Link (d) - Hubert Clifford [Plankton appears] • ? - Nicolas Carr ["What are you talking about?"] ‣Keel Row - Brian Peters [Krabs laughs] ‣Background Blues - Otto Sieben [Nat appears] ‣Wargames Linking Section (d) - Keith Mansfield ["Oh, no! How can this be?"] ‣ ? ["Plankton's trying to overthrow me business."] ‣ ? ["Oh, you can count on me, sir."] ‣The Rake Hornpipe - Robert Alexander White [Nat refuses to eat a Krabby Patty] ‣ ? ["There he is... just in time for breakfast."] • ? - Sage Guyton, Jeremy Wakefield [SpongeBob tries to get Nat to eat a Krabby Patty] • ? - Jeremy Wakefield ["From now on, keep those shabby patties to yourself."] ‣Background Blues - Otto Sieben [Nat goes back to the Chum Bucket] ‣ ? [SpongeBob pretending to be Karen] •Vibe Sting - Nicolas Carr ["A shortcut to the Chum Bucket?"] ‣Tripping Upstairs - Brian Peters [Krusty Krab chum] ‣Evil Mind 8 - Dick de Benedictis ["It's... it's..."] ‣Hawaiian Cocktail - Richard Myhill ["It's the second foulest thing I've ever tasted!"] ‣ ? [Krabs tries to steal Plankton's recipe] ‣Comic Capers B - Charlie Brissette, Norman Mamey [alarm goes off] ‣Wargames Linking Section (g) - Keith Mansfield ["What do you think, Krabs baby?"] ‣Guerilla Warfare - Harry Bluestone ["Triple irony, Plankton!"] •Steel Sting - Jeremy Wakefield [Plankton groans] ‣Wargames Linking Section (f) - Keith Mansfield ["Good thing I sprang for the dual spoon installation."] ‣Verve - Jack Shaindlin [Karen senses Nat approaching] ‣ ? [ending]
The first clue that Nat hated Plankton's Chum was when Mr. Krabs made Nat eat his brand of chum. When Nat ate the new chum, he said that it was the "second foulest thing he had ever tasted," so that might mean that Plankton's chum was the most foul thing he had ever tasted. That means he hated the Chum Bucket's chum more than the Krusty Krab's chum.
This also proves that Plankton can't even make chum better than Mr. Krabs which is the only thing he is good at making.
The second clue that Nat hated Plankton's chum was when the second time Nat came to the Chum Bucket, Nat looked like he hated it, but he lied and said "It's perfection!"
Mr Krabs in this episode shows an extreme level of pettiness as he apparently doesn't want Plankton to have even one customer, despite meaning it would save him the grief of stopping Plankton from stealing the patty formula. Meaning he either thinks that Nat not being his customer would ruin his business, or he's so petty he doesn't want Plankton to succeed in any way.
The third clue is that he said he doesn't like Krabby Patties and that he doesn't have any friends but in one scene he can be seen sitting at the Krusty Krab eating a Krabby Patty with other people.
Numerous times throughout the series Nat was shown liking Krabby Patties, this could be because Karen also payed him to lie about disliking Krabby Patties just as much as he lied about liked chum.
In Missing Identity, when Nat was at work, they said his name was Peterson. It has now been confirmed that that was his last name.
Running Gag: Nat getting chum, and SpongeBob and Mr. Krabs trying to get him to eat Krabby Patties.
This is the second time Mr. Krabs steals other formulas. The first being in Best Frenemies.
When Nat came to the Chum Bucket the second time, he ate two chum sticks, but he only payed for one.
Plankton started waiting Nat at 10:00 a.m. and ended at 5:57 p.m. That's 3 minutes before closing time for both the Chum Bucket and the Krusty Krab.
When Nat opens the door to the Chum Bucket, SpongeBob was on the ground. SpongeBob was offering Nat a Krabby Patty, but Nat did not want it. When Nat opened the door, he peeled some of SpongeBob's skin off, which scared younger viewers.